In neuromuscular electrical stimulation, what on:off time ratio would align with 1:5?

The on:off time ratio of 1:5 indicates that for every unit of time spent on stimulating the muscle (the "on" time), there should be five times that amount of time spent in a rest or recovery phase (the "off" time).

In this case, the choice that reflects a 1:5 ratio is the option that demonstrates one second of stimulation followed by five seconds of rest. Option A specifies 8 seconds of stimulation followed by 40 seconds of rest. This totals to a 48-second cycle, where the stimulation time (8 seconds) divided by the rest time (40 seconds) exactly produces the desired ratio of 1:5.

Each of the other choices presents different times for stimulation and rest that do not maintain this specific ratio. The balancing of the on and off times is crucial in clinical practice as it influences muscle recovery and prevents fatigue, essential aspects when using neuromuscular electrical stimulation.