Yes. It has been proven that concentrating on strength then reducing volume but maintaining intensity can lead to increases in power and maintenance or a slight increase in strength. So what you will find is that during spells of relatively high volume of weights, power doesn’t increase but once the volume is decreased and fatigue is less of a drag on your body, the fitness gains are optimized. This is known as a residual training effect, super compensation or the delayed training effect. Verkhoshansky, Staron and Tidow and other researchers have proven this and top coaches are aware of this phenomenon.