Training Load and Administration

Training load was quantified using the individualized training impulse (iTRIMP) as described elsewhere (Manzi et al., 2009), by weighing exercise intensity according to an individual’s own HR vs. [BLa⁻] relationship, calculated by line of best fit from the lactate profile and VO_2max test. iTRIMP uses the weighting factor y_i, which increases exponentially based on the HR vs. [La⁻] relationship to weight every HR. An accumulated iTRIMP score was calculated by the following equation:

where ΔHR_ratio is calculated from (HR_work−HR_rest)/(HR_max−HR_rest), and D is time spent exercising. Design and training load administration is specified in Figure 2.

Training load during lead-in and 3 week intervention using the individualized TRIMP method. Mean ± SD.