10/06/2020
It's generally believed that in order to improve in strength and especially to gain muscle, it's important to train close to the point of failure--it's been suggested that significant improvements START to accrue on the fifth repetition prior to the ultimate failed rep attempt. In an interesting study from 2017 in the Journal of Strength and Conditioning Research, researchers looked at the effectiveness of self-selected loads for the bench press. They had lifters indicate the weights that they typically use for 10-rep sets in the bench press. Then the researchers loaded up the bar with that weight and pushed the lifters to lift it as many times as possible. The results in terms of total reps attained:
10-12 reps, 22% of lifters
13-15 reps, 31% of lifters
16-18 reps, 21% of lifters
19-21+ reps, 26% of lifters
Over a quarter of the "trained" lifters were using weights in which they could actually do 9+ additional reps with at the end of a normal set! If you need to be within 5 reps of failure to cause progress, 47% of these trained lifters were regularly training in a way that would likely not result in progress.
What to do? Make sure you are really pushing yourself in workouts. Log sets/reps/weight to ensure that you're improving over time. Work with a coach to ensure adequate load selection and effort in training.
Barbosa-Netto, S, d'Acelino-e-Porto, OS, and Almeida, MB. Self-selected resistance exercise load: implications for research and prescription. J Strength Cond Res XX(X): 000-000, 2017-Resistance training has been widely used for maintaining or improving the quality of life and sports performance. It....