 In terms of time, when the band is unloaded, the effect (the length) lagged behind the cause (the force of the weights) because the length has not yet reached the value it had for the same weight during the loading part of the cycle.In terms of energy, more energy was required during the loading than the unloading, the excess energy being dissipated as thermal energy.Elastic hysteresis is more pronounced when the loading and unloading is done quickly than when it is done slowly.