It only builds new tissue or recruits more motor units when current capacity isn’t enough to handle the workload. Your muscles don’t grow because you showed up to the gym. For strength outcomes, it’s possible that the cross-education effect confounded the results, although I doubt to a very meaningful degree. The presently reviewed study was a good addition to the literature for the hypertrophy outcomes because it was a within-subjects design. Typically, I am better at choosing a method for others, but for myself, I would often try to integrate too many different concepts, mitigating their effectiveness or losing focus on the main goal (progress). As a coach and lifter, I have agonized many times over what exact method to use for myself or for various athletes.
Therefore, it’s possible in the presently reviewed study that the benefits of increased loading in the load progression group were also realized in the rep progression group, which explains the lack of between-condition difference in strength gains. However, Plotkin et al reported that strength increased "slightly" more (+5.9%) in the load progression group, and that the rep progression group experienced a 1.8% greater change in the sum of all rectus femoris site muscle thicknesses. Plotkin et al had the rep progression group complete 4 sets to failure with a 10RM each session and increased reps as they could, which was identical to the present study. The researchers hypothesized that load progression would lead to greater increases in both strength and muscle size than volume progression. The primary purpose of the reviewed study was to compare changes in leg extension 1RM and vastus lateralis cross-sectional area over 10 weeks of training that progressed either the load lifted or reps performed in untrained men and women. Fortunately, a new within-subjects design study by Chaves et al (1) once again compared load and rep progressions for strength and hypertrophy in a mixed-sex population, but this time they tested specific strength.
65 kg (143 lb) × 3 sets × 8 reps. Repeat the progression cycle. Resistance training with progressive overload is one of the most effective interventions for age-related muscle loss, called sarcopenia. Progress by adding reps within a range, then bumping weight when you hit the top of the range (double progression). The best progress indicators are total volume per muscle group, estimated one rep max trends, and rep PRs at given weights.
Simply put, having more muscle does not necessarily equate to having more testosterone. While testosterone is undeniably a vital hormone for building and maintaining muscle, it’s not a one-way street. The relationship between muscle mass and testosterone is complex and often misunderstood. This integrated approach—training stimulus plus recovery infrastructure—closes the gap between effort in the gym and measurable physiological adaptation. For most people, 3 to 4 days per week of resistance training is the sweet spot. It also modulates the inflammatory response after training, which means faster recovery between sessions.
60 kg (132 lb) × 3 sets × 8 reps. Focus on solid form. A 2017 meta-analysis by Schoenfeld et al. found that 10–20 sets per muscle group per week works well for most people. Track your workouts to ensure progressive overload is actually happening.
If you aren't progressively overloading, you aren't growing. Progressive overload is not just about adding weight to the bar. Deloads help manage fatigue and maintain long-term progress. Intermediates should aim for increases every 1–2 weeks (1.25–2.5 kg). Higher volumes can work for advanced lifters but require careful fatigue management and planned deloads. Better execution means more efficient force production and heavier weights over time.
A caloric surplus is necessary to support the anabolic processes that lead to muscle building. Other factors such as genetics, diet, exercise, and lifestyle also play a significant role. One of the reasons why some individuals may build muscle more easily than others is due to their hormonal profile.
Both groups also reported an increase in growth hormone levels too, with the younger subjects finding an increase of 45% but the older group only having increases of 3%. Both groups were asked to complete a 12-week program involving minutes of major muscle group weight training. Studies show that not only does progressive weight training improve body composition and muscular fitness, it’ll also enhance your hormone profile too. Initially, overload should be achieved within 8-12 reps, however as you become more accustomed to this rep range you can begin to explore 1-12 rep ranges, as well as different loads, rest times and rep speeds . Some individuals are naturally predisposed to having more muscle and higher testosterone levels than others. The degree of muscle growth is typically less than in men due to the hormonal difference. Women have significantly lower testosterone levels than men, but they can still build muscle.