Humans - Required Rest Time

Required rest or relaxation time related to working time and power expenditure can be estimated as:

t_r = t_t (q_t - q_m) / (q_t - q_r)                                    (1)

where

t_r = required relaxation or rest time (minutes)

t_t = task or work time (minutes)

q_t = task or work power consumption (W, watts)

q_m = maximum power consumption level in a day with no recovery requirement (W, watts) (approximately 350 Watts for most male workers, approximately 300 W for most female workers)

q_r = resting power consumption (W, watts) (commonly between 70 - 100 W)

Example - Required Relaxation Time

Required rest time for a male worker in very heavy work with task power consumption 600 W, resting powewr 100 W and task time 60 min, can be calculated as

t_r = (60 min) ((600 W) - (350 W)) / ((600 W) - (100 W))

    = 30 min