If overuse injury is a ‘training load error’, should undertraining be viewed the same way?

Inappropriately high training loads cause overuse injuries.1 However, it has recently been proposed that overuse injuries should be considered in terms of both ‘overloading’ and ‘underloading’.2 The rationale is that increased injury risk is associated with ‘spikes’ in workload (ie, overloading) and low chronic workloads (ie, underloading), which may leave an athlete predisposed to a ‘spike’ in workload.3 Given that workload is both modifiable...