Not working out for long enough can limit your strength training progress or stall it altogether, but working out too frequently or for too long can also sabotage your efforts. Strength trainers need to find a balance between pursuing their goals and avoiding excessive workouts that actually slow muscle development and have negative health consequences.
Recommendations for strength training workout duration
I didn’t find any good studies actually testing the effects of different workout durations, but I did find plenty of expert recommendations. Although these recommendations varied, the majority said that strength training workouts should be around 30-60 minutes, unless you’re trying to develop the sort of extreme hypertrophy you see at bodybuilding competitions. Most people won’t make much progress with fewer than 30 minutes, and at more than 60 minutes, the risk of overtraining syndrome increases significantly.
Ideal workout times will vary based on your goals, training style, and personal physiology. If you’re taking shorter rests and burning through your workout quickly, you can do a high-intensity workout pretty fast. On the other hand, if you’re lifting very heavy weights with longer rests in between sets (a good strategy for strength building), then your workouts will take longer. Of course, they’ll also take longer if you spend a lot of time socializing at the gym.
Symptoms of overtraining
How can you tell if you’re overtraining? Signs that you’re pushing things too far include a variety of nasty physical and psychological effects, many of which are similar to flu symptoms:
- Feeling tired all the time
- Chronic muscle soreness or weakness
- Getting sick or injured more often
- Gastrointestinal problems
- Appetite reduction or loss
- Insatiable thirst
- Difficulty concentrating
- Taking longer than usual to recover after exercise
- Decreased motivation to work out (in those who usually enjoy exercise)
- Stalled progress
Slight overtraining (defined as overreaching syndrome) can trigger symptoms that last for days or even weeks, while more serious overtraining can have negative psychological and physical effects that last for months.
Recommended number of sets per strength training workout
The University of Colorado Hospital recommends doing no more than 20 sets per workout to avoid overtraining (this would cap workouts at approximately 40-60 minutes, depending on how fast you do your sets and how long you rest in between sets). Some advanced strength trainers do more, but for most people, 20 should be enough, especially for those who are doing high-intensity workouts (lifting very heavy weights) or split routines (working different muscle groups on different days) so they can train 4-6 times a week.
How often should you train?
There is a consensus among the experts that you shouldn’t do strength training exercises targeting the same muscles every day. You can either do a full-body workout 2-3 days per week or a split routine where you target different muscle groups on alternating days. Research suggests that both strategies are equally effective for building muscle strength and functional fitness, assuming that you do a similar number of sets per week overall (Crewther et al., 2016; Heke, 2011).
For answers to more frequently asked strength training, general fitness, and health questions, see the main Mind-Body Health and Fitness page.
- Barnham, T. (2014). Should I do a split or full-body workout? Men’s Health.
- Crewther, B. T., Heke, T. O. L., & Keogh, J. W. L. (2016). The effects of two equal-volume training protocols upon strength, body composition and salivary hormones in male rugby union players. Biology of Sport, 33(2), 111-116.
- De Medeiros, J. (n.d.). 12 Signs You’re Overtraining. Men’s Fitness.
- Heke, T. O. (2011). The effect of two-equal volume training protocols upon strength, body composition and salivary hormones in strength trained males.(Doctoral dissertation, Auckland University of Technology).
- Kinucan, P., & Kravitz, L. (2007). Overtraining: Undermining Success? ACSM’s Health & Fitness Journal, 11(4), 8-12.
- Mike, J., PHD(C), CSCS,*D, NSCA-CPT,*D, USAW. (n.d.). Overtraining and Recovery [PDF]. National Strength and Conditioning Association.
- Smith, B. (n.d.). Ask Men’s Fitness: is it better to do full-body workouts or body-part focused routines? Men’s Fitness.
- University of Colorado Hospital, Denver. (2004). CU Sports Medicine: Strength Training Tips [PDF]. UCDenver.edu.
- Wescott, W.L. How Often Should Clients Perform Strength Training? [PDF] ACSM’s Certified News 2010, 20(2), 10-11.