What is a deload week?

The short answer

A deload week is a planned stretch of easier training, usually about a week, in which a client does less work so the fatigue built up over a hard block can clear. Volume drops compared with a normal week. Intensity may drop too, but it doesn’t have to.^{1Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 103.}

You’ll also hear it called a light week, an unload or a recovery microcycle.^{1Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 103.},^{2Hoffman, NSCA’s Guide to Program Design, p. 268.}

Plan the deload as part of the program to clear fatigue so the client can keep progressing.^{3Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 104.} A taper uses the same idea for a different job: peaking for a competition.^{4Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 140.}

Why do deload weeks work?

The fitness-fatigue model, also called the two-factor model, explains why deloads work. Each session builds some fitness and creates fatigue. How ready a client is to perform on any given day is the sum of the two.^{5Zatsiorsky, Kraemer and Fry, Science and Practice of Strength Training, 3rd ed., p. 29.}

The fitness gain from one session is modest but long-lasting; the fatigue is larger but short-lived.^{5Zatsiorsky, Kraemer and Fry, Science and Practice of Strength Training, 3rd ed., p. 29.} As a rough estimate, fatigue from an average workout lasts about a third as long as the fitness it produced: if the fatigue lasts 24 hours, the gain is still there at 72.^{6Zatsiorsky, Kraemer and Fry, Science and Practice of Strength Training, 3rd ed., p. 30.}

Train hard week after week and fatigue stacks up faster than it clears. Fitness is still climbing, but performance stalls or slips because fatigue is masking it. By the end of a three-week loading block, fatigue is at its highest and performance can be clearly impaired.^{2Hoffman, NSCA’s Guide to Program Design, p. 268.} A lighter week works because fatigue fades faster than fitness.^{7Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 56.} As fatigue clears, the client retains fitness and can reach a new performance high.^{8Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 57.}

Built-up fatigue is a common cause of plateaus. Deloads may also lower injury risk by giving joints and connective tissue time to recover, and they give the mind a break after a hard block.^{3Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 104.}

How often should you deload?

It depends mostly on training age. Beginners recover quickly, so they rarely need a scheduled light week. Intermediate and advanced lifters usually work in blocks with a deload at the end.

Who	Typical rhythm
Novice	No set schedule. After two sessions in a row of missed targets, cut the load by 10% and build back up.9Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 106.
General periodized plan	Three weeks of rising load, then one recovery week, often called 3:1.2Hoffman, NSCA’s Guide to Program Design, p. 268.
Hypertrophy, intermediate to advanced	Build for 3–8 weeks, most often 4–6, then deload.10Israetel et al., Scientific Principles of Hypertrophy Training, p. 153.
Strength, intermediate	Check recovery after each three-week wave. Deload at least once every three waves (nine weeks).11Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 243.

Planned or reactive deloads?

Coaches disagree here.

Israetel and colleagues favor scheduling deloads in most cases. They argue that a well-timed reactive deload would probably fall in the same week anyway. A fixed date also lets you work around shows, holidays and travel.^{12Israetel et al., Scientific Principles of Hypertrophy Training, p. 174.}

Helms prefers to decide as you go. Even a well-planned program can’t predict stressful weeks, bad sleep or illness, so fixed deloads end up too frequent or too rare. Outside of a diet, his preferred method is a short checklist at the end of each block.^{13Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 123.} He keeps one fixed rule as a backstop: after three blocks in a row without a deload, take one regardless.^{14Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 124.}

You can schedule a deload and move it if the client’s recovery changes. If you’re unsure, bring it forward: an occasional early deload costs less than delaying one.^{15Israetel et al., Scientific Principles of Hypertrophy Training, p. 169.}

What are the signs a client needs a deload?

Helms’s end-of-block checklist asks five questions:^{13Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 123.}

• Are you dreading the gym?
• Is your sleep worse than normal?
• Are your loads or reps going down?
• Is your life stress higher than normal?
• Are aches and pains worse than normal?

Two or more yeses means a deload week. If aches and pains are the only yes, he suggests a higher-rep week instead.^{13Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 123.}

Israetel adds some triggers for an unplanned deload: more than half of the client’s muscle groups needing extra recovery in the last two weeks, an illness with a fever, or an injury that won’t settle within a few days.^{16Israetel et al., Scientific Principles of Hypertrophy Training, p. 168.},^{15Israetel et al., Scientific Principles of Hypertrophy Training, p. 169.}

The NSCA’s personal training text says to suspect overreaching when performance drops alongside fatigue, feeling unwell, lost enthusiasm for training or extra soreness.^{17Schoenfeld and Snarr (eds.), NSCA’s Essentials of Personal Training, 3rd ed., p. 115.}

How to do a deload week

The reduction in training has to be substantial. Trimming a few reps or half a set does little to reduce fatigue.^{16Israetel et al., Scientific Principles of Hypertrophy Training, p. 168.},^{18Israetel et al., Scientific Principles of Hypertrophy Training, p. 170.}

Method	What changes	Suits
Cut volume, keep load	About half the usual volume at similar weights, so each set ends further from failure9Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 106.	Most intermediate lifters
Cut volume, then load	Half the sets and reps all week; halve the weights too in the second half15Israetel et al., Scientific Principles of Hypertrophy Training, p. 169.	Hypertrophy blocks
Cut load	Same sets and reps, 10% lighter9Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 106.	Novices
Swap exercises	Lower-fatigue versions of the same movements19Israetel et al., Scientific Principles of Hypertrophy Training, p. 171.	Sore joints, advanced lifters
Active rest	No formal training; light, low-volume recreational activity20Haff and Triplett (eds.), Essentials of Strength Training and Conditioning, 4th ed., p. 607.	End of a season, once or twice a year

Should you reduce volume or intensity?

The most common advice is to cut volume and keep the weights heavy. Helms’s example: 3 sets of 10 at 200 lb becomes 2 sets of 8 at 200 lb. Volume falls by about half and each set feels about two points easier on a 1–10 effort scale.^{9Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 106.} That approach borrows from taper research, which favors cutting volume while keeping intensity about the same.^{21Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 105.}

Endurance research agrees. In pooled tapering studies, performance improved when intensity was kept up and stayed flat or dipped when it was cut. A 41–60% drop in volume was a safe range.^{22Mujika and Le Meur, in USA Triathlon, Complete Triathlon Guide, p. 142.},^{23Mujika and Le Meur, in USA Triathlon, Complete Triathlon Guide, p. 145.}

Israetel keeps the loads but halves sets and reps for the first half of the week. The second half halves the weights as well.^{15Israetel et al., Scientific Principles of Hypertrophy Training, p. 169.} So a quad week of 6×10 squats at 200 lb and 8×20 leg presses at 300 lb becomes 3×5 squats at 200 lb and 4×10 leg presses at 150 lb.^{18Israetel et al., Scientific Principles of Hypertrophy Training, p. 170.} Israetel’s version is the deeper cut: half the sets, and about a quarter of the total reps. The two also differ on whether the weights should come down late in the week.

For a sense of where volume normally sits, see how many sets per week build muscle.

Should you train fewer days during a deload?

Cutting the number of sessions has the least support in the research. In the taper studies, fewer sessions didn’t clearly improve performance.^{22Mujika and Le Meur, in USA Triathlon, Complete Triathlon Guide, p. 142.} The detraining research agrees: well-trained athletes should cut frequency by no more than 20–30%, while volume can fall a long way.^{24Mujika and Padilla, Detraining, Part II: Long Term Insufficient Training Stimulus, p. 7.} Israetel does allow merging some deload sessions to free up rest days.^{19Israetel et al., Scientific Principles of Hypertrophy Training, p. 171.} Use shorter sessions as the default before cutting training days.

Active rest

A longer active rest phase, usually 1–4 weeks, suits the end of a season. Clients play other sports or do light fitness work at low intensity and low volume.^{20Haff and Triplett (eds.), Essentials of Strength Training and Conditioning, 4th ed., p. 607.} For physique clients, Israetel suggests at least one full week off a year, ideally straight after a deload and during a holiday.^{25Israetel et al., Scientific Principles of Hypertrophy Training, p. 172.}

How long can a client take off before losing fitness?

• One week. A deload week carries no risk of muscle loss.^{18Israetel et al., Scientific Principles of Hypertrophy Training, p. 170.}
• Two weeks. In experienced and recreational lifters, 14 days off seems to have little effect on strength and power.^{26Schoenfeld and Snarr (eds.), NSCA’s Essentials of Personal Training, 3rd ed., p. 99.} Studies of strength athletes found small, non-significant drops in squat, bench and jump after two weeks, though lowering (eccentric) strength fell more clearly.^{27Mujika and Padilla, Detraining, Part I: Short Term Insufficient Training Stimulus, p. 6.} Any muscle lost in a two-week break is small and comes back quickly.^{19Israetel et al., Scientific Principles of Hypertrophy Training, p. 171.}
• Up to four weeks. Trained swimmers kept their strength through four weeks off, though their power in the water fell.^{27Mujika and Padilla, Detraining, Part I: Short Term Insufficient Training Stimulus, p. 6.}
• Beyond four weeks. Strength declines slowly and usually stays above untrained levels for a long time.^{28Mujika and Padilla, Detraining, Part II: Long Term Insufficient Training Stimulus, p. 1.} The NSCA still advises keeping active rest to four weeks or less, because longer breaks need a longer build-up to regain form.^{20Haff and Triplett (eds.), Essentials of Strength Training and Conditioning, 4th ed., p. 607.}

Endurance fades faster. In highly trained endurance athletes, VO2max (the body’s top rate of oxygen use) falls 4–14% within four weeks of stopping. In recently trained people it falls less, about 3.6–6% over two to four weeks.^{29Mujika and Padilla, Detraining, Part I: Short Term Insufficient Training Stimulus, p. 2.} Muscular endurance starts to drop after about two weeks.^{17Schoenfeld and Snarr (eds.), NSCA’s Essentials of Personal Training, 3rd ed., p. 115.}

If a client can’t train normally, keeping intensity up matters most. Volume can drop by 60–90% if frequency stays fairly steady.^{24Mujika and Padilla, Detraining, Part II: Long Term Insufficient Training Stimulus, p. 7.} One resistance session a week can hold strength for many clients, though older clients may need two.^{26Schoenfeld and Snarr (eds.), NSCA’s Essentials of Personal Training, 3rd ed., p. 99.}

When it’s more than fatigue

Short-term overreaching from hard training normally clears within a few days or weeks.^{30Haff and Triplett (eds.), Essentials of Strength Training and Conditioning, 4th ed., p. 123.} If a client is still flat after a deload or needs another soon after, check for other causes.

• If a client deloads and quickly ends up worn down again, the program probably has too much volume. Helms suggests cutting sets by about 20% across the board.^{14Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 124.},^{31Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 125.}
• With non-functional overreaching, performance stalls or falls and recovery takes weeks to months. Full overtraining syndrome takes months to recover from.^{32Haff and Triplett (eds.), Essentials of Strength Training and Conditioning, 4th ed., p. 145.} It’s rare in resistance training, and the warning signs usually show up well in advance.^{33Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 55.}
• The NSCA’s checklist for suspected overtraining includes ruling out illness, anemia, infection, hormonal disorders and eating disorders.^{32Haff and Triplett (eds.), Essentials of Strength Training and Conditioning, 4th ed., p. 145.} That’s outside a trainer’s scope. If unexplained fatigue or underperformance doesn’t lift with rest, refer the client to their doctor.

What the evidence does and doesn’t say

The fitness-fatigue model and the detraining research are well established. Deloads themselves are less so. Most deload advice for lifters comes from coaching experience and borrows from taper research.^{21Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 105.} Much of that taper research was done in endurance athletes.^{22Mujika and Le Meur, in USA Triathlon, Complete Triathlon Guide, p. 142.} Schedules such as 3:1 or a deload every 4–6 weeks are coaching conventions that work for many people. Trials haven’t established them as rules, so adjust them to the client’s recovery.

Coaching a client through it

1. Explain the deload before it happens. Keen clients often convince themselves they don’t need one. Explain how recovering from the last block prepares them for the next.^{7Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 56.}
2. Run the five-question checklist at the end of every block. It takes a minute and catches problems early.^{13Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 123.}
3. Keep the usual training days and gym, with shorter sessions to maintain the routine.
4. Use the lighter week to practice the next block’s exercises and work on technique.^{18Israetel et al., Scientific Principles of Hypertrophy Training, p. 170.}
5. Time the end of the block so the deload falls during a holiday or a busy work week, if one is coming.^{12Israetel et al., Scientific Principles of Hypertrophy Training, p. 174.}
6. Change the program if the client needs a deload every couple of weeks.^{14Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 124.}

Common questions

Do beginners need deload weeks?

Beginners usually don’t need scheduled deload weeks. A novice who misses their targets two sessions in a row can drop the load by 10% for one session and then carry on progressing.^{9Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 106.}

Will you lose muscle during a deload week?

No. A week of much lighter training isn’t long enough to cost muscle.^{18Israetel et al., Scientific Principles of Hypertrophy Training, p. 170.} Even two weeks completely off causes only minimal loss, and it returns quickly.^{19Israetel et al., Scientific Principles of Hypertrophy Training, p. 171.}

Is a deload the same as a taper?

Both clear fatigue. A deload lets training continue. A taper clears fatigue so the client peaks on competition day. Helms suggests starting a taper 1–4 weeks out, cutting volume by one-third to two-thirds, and keeping intensity within about 10% of normal.^{4Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 140.}

How long should a deload last?

Usually about a week.^{1Helms et al., The Muscle & Strength Pyramid: Training, 2nd ed., p. 103.} It can be shorter. In block periodization, recovery microcycles run 3–7 days, and often 3–4 days after a training camp or competition.^{34Issurin, Block Periodization: Breakthrough in Sports Training, p. 94.}

Should you take a full week off for a deload?

It can be, but a lighter week of training is the usual approach. Full weeks off fit better as an active rest phase, typically once a year, ideally straight after a deload.^{19Israetel et al., Scientific Principles of Hypertrophy Training, p. 171.},^{25Israetel et al., Scientific Principles of Hypertrophy Training, p. 172.}