The effect of resistance training, detraining and retraining on muscle strength and power, myofibre size, satellite cells and myonuclei in older men.

•Strength and power improvements are partially preserved during detraining.•Rapid return of 1RM performance to post-training level following retraining.•Type II fibre regrowth with increases in satellite cell and myonuclear number.•Stable myonuclear domain despite type II fibre size changes.•More PCM1-stained myonuclei compared to conventional labelling.