Endurance training amplifies the pulsatile release of growth hormone: effects of training intensity.

The effects of intensity of run training on the pulsatile release of growth hormone (GH) were investigated in 21 eumenorrheic untrained women. The O2 consumption (VO2) at the lactate threshold (LT); fixed blood lactate concentrations (FBLC) of 2.0, 2.

Durability of the reproductive axis in eumenorrheic women during 1 yr of endurance training.

Menstrual cycle (MC) alterations occur in some endurance-training women. We hypothesized that a prospective running program would evoke alterations in MC phase lengths and in the physiological frequency of pulses of luteinizing hormone (LH) and/or diminish 24-h integrated serum LH concentrations in some women. In addition, we postulated that women who train more intensively (above the lactate threshold) would show alterations in gonadotropin release earlier in the training program or to a greater degree.

Percentages of maximal heart rate, heart rate reserve and VO2max for determining endurance training intensity in male runners.

The use of 60%-95% of maximal heart rate (HR), heart rate reserve (HRR) and VO2max as exercise training intensities was examined in male runners, and these intensities were related to VO2 observed at the lactate threshold (LT) and fixed blood lactate concentrations (FBLC) of 2.0, 2.5, and 4.

Reliability and validity of a continuous incremental treadmill protocol for the determination of lactate threshold, fixed blood lactate concentrations, and VO2max.

Fifteen male runners were tested on two occasions to determine the reliability of a continuous incremental level running treadmill protocol (C), with 3-min stages, for lactate threshold (LT) and fixed blood lactate concentration (FBLC) (2.0 mM, 2.5 mM, 4.

Prediction of lactate threshold and fixed blood lactate concentrations from 3200-m running performance in male runners.

To determine the effectiveness of a 3200-m time trial for predicting VO2 and running velocity at lactate threshold (LT), fixed blood lactate concentrations of 2.0, 2.5, and 4.