Slow vs Fast Reps: What Tempo Should Beginners Use?
General information: This article is general information about rep tempo and strength training and how an app works. It has not been reviewed by a dietitian, doctor or qualified trainer, and it is not a substitute for their advice.
Fitness reels tell you to lower the weight for five seconds and squeeze, while a trainer says just lift. Which is right for a beginner? This page checks what a meta-analysis, a randomised trial and a 2025 review report about how fast to lift, then gives a simple tempo to start with.
The short answer
Lift with control at a steady pace; very slow reps do not appear necessary. A meta-analysis of 8 studies (Schoenfeld et al., 2015) of trials in which every set was taken to muscle failure found muscle growth was similar with repetitions lasting 0.5 to 8 seconds, and suggested that very slow reps (over 10 seconds each) were inferior for muscle growth, although few controlled studies exist. In untrained people, a randomised trial of 115 untrained people (Munn et al., 2005) of one arm exercise over 6 weeks found fast training gave a larger strength gain than slow training, a borderline result; slow training also raised strength.
What the research says
- Muscle growth: a wide range works. The meta-analysis of 8 studies (Schoenfeld et al., 2015) included only trials of at least 6 weeks with every set taken to muscle failure. It found hypertrophic outcomes similar across repetition durations of 0.5 to 8 seconds, and reported that training at volitionally very slow durations (over 10 seconds a repetition) looked inferior, while noting that definitive conclusions are difficult.
- Beginners: fast edged slow for strength in one trial. In the randomised trial of 115 untrained people (Munn et al., 2005), trained 3 times a week for 6 weeks on elbow flexions with a 6 to 8RM load, fast training (about 140 degrees a second) produced a greater strength increase than slow training (about 50 degrees a second); the difference was 11% (95% CI 0.2 to 23%, P = 0.046). Slow training still raised strength (one slow set alone: 25%). Three sets also beat one set by 23% of initial strength.
- Slower lowering: unclear. The 2025 meta-analysis of 9 studies (Amdi et al.) (166 participants) compared shorter and longer eccentric (lowering) phases. Shorter eccentrics improved countermovement jump height, while estimates for maximal strength and muscle growth were uncertain, and longer eccentrics gave similar or higher strength gains in trained participants and in volume-matched trials. The authors said more research is needed.
These are training trials and reviews of trials in healthy people (77% of the participants in the 2025 review were men), and the beginner trial tested one arm exercise for 6 weeks; they describe averages, not what will happen to you.
A starting tempo (our practical template)
The table below is our own reading of those studies, not a trial result.
| Phase | What to do |
|---|---|
| Lifting | Controlled and steady, about 1 to 2 seconds; no jerking or bouncing. |
| Lowering | Control the weight down for about 2 to 3 seconds instead of dropping it. |
| Total per rep | Stay inside roughly 1 to 6 seconds, well within the 0.5 to 8 second range the review covered. |
| Sets and reps | Spend your effort on completing every set with good form rather than on slowing reps down; three sets beat one in the beginner trial. |
Slow, controlled lowering is one way to make an exercise harder without adding weight (see the progressive overload guide), but it is a choice, not a rule. Follow a plan such as the beginner gym plan, and take the rest between sets you need.
When to see a doctor or trainer first
If you have an injury, pain, a medical condition, are pregnant, or have not exercised for a long time, ask your doctor or a qualified trainer before you train hard, and do not push through pain. Stop and get advice if you feel sharp pain or dizziness. A trainer can check your form and pace.
Logging sets in NYUS
NYUS is an AI diet and workout coach. On the workout screen you can log each set and use the rest timer, and each exercise shows what you did last time ("Last: ..."). NYUS does not time your reps: your pace is yours to judge.
Log your sets in NYUS
Log each set and see what you did last time on every exercise. An AI diet and workout coach built around Indian food. 30-day free trial, then ₹499/month, no card needed to start. No ads, no data sold.
Join the NYUS waitlistFrequently asked questions
Should beginners lift slowly?
Not necessarily. A meta-analysis of trials with every set taken to muscle failure found muscle growth was similar with repetitions lasting 0.5 to 8 seconds, and a randomised trial in untrained people found fast training gave a larger strength gain than slow training in one arm exercise (a borderline result). Our practical reading: lift with control at a steady pace.
Are very slow reps better for muscle?
The meta-analysis suggested very slow repetitions (over 10 seconds each) were inferior for muscle growth, though the authors noted few controlled studies make firm conclusions difficult.
Does a slow lowering phase help?
A 2025 meta-analysis of 9 studies found uncertain effects of shorter or longer eccentric phases on maximal strength and muscle growth, shorter eccentrics improved countermovement jump height, and longer eccentrics gave similar or higher strength gains in trained participants and in volume-matched trials. The authors say more research is needed.
How many sets should a beginner do?
In a 6-week trial of 115 untrained people, three sets produced greater strength gains than one set (a difference of 23% of initial strength). Our practical reading is to start with two to three sets and build up gradually.
Sources (read 23 October 2026)
- Schoenfeld, Ogborn and Krieger, Effect of repetition duration during resistance training on muscle hypertrophy: a systematic review and meta-analysis (Sports Med 2015) (abstract; DOI 10.1007/s40279-015-0304-0, PubMed 25601394, read 23 Oct 2026): 8 studies, experimental trials of at least 6 weeks, training to muscle failure; hypertrophic outcomes similar with repetition durations of 0.5 to 8 s; very slow durations (over 10 s) inferior, but a lack of controlled studies makes definitive conclusions difficult.
- Munn et al., Resistance training for strength: effect of number of sets and contraction speed (Med Sci Sports Exerc 2005) (abstract; DOI 10.1249/01.mss.0000177583.41245.4e, PubMed 16177617, read 23 Oct 2026): 115 healthy untrained subjects, 4 training groups plus control; 3 sessions a week for 6 weeks; unilateral elbow flexion, 6-8RM; three sets gave a 23% greater strength increase than one set (95% CI 12-34%, P < 0.001); fast training (about 140 degrees/s) beat slow (about 50 degrees/s) by 11% (95% CI 0.2-23%, P = 0.046); one slow set alone raised strength 25% (95% CI 13-36%); no additive benefit of both.
- Amdi et al., The effect of eccentric phase duration on maximal strength, muscle hypertrophy and countermovement jump height: a systematic review and meta-analysis (J Sports Sci 2025) (abstract; DOI 10.1080/02640414.2025.2535198, PubMed 40692176, read 23 Oct 2026): 9 studies, 166 participants (46% trained, 77% male); shorter eccentric phase improved countermovement jump (g = -0.73); longer eccentrics similar or higher strength gains in trained participants (g = 0.33) and volume-load matched trials (g = 0.25); uncertain estimates for maximal strength (g = 0.25) and muscle hypertrophy (g = 0.05); more research needed.
- The starting tempo and the practical rules are NYUS's own reading, not from a trial. App behaviour checked in the NYUS app on 23 Oct 2026.