Heart rate and oxygen consumption relationship changes following intense training

Publisher Website
Google Scholar
Abstract
Seven male competitive runners (maximal oxygen consumption [VO2max] 66.2 ± 3.6 ml.kg‐1‐min‐1) participated in an evaluation of the effect of intense training on the relationships between heart rate (HR), VO2, and running speed. To establish a baseline relationship, subjects twice performed four randomly ordered steady‐state runs at a constant grade of 2.5%, and one maximal graded exercise test, following days of moderate intensity training (approximately 80% of v"O2max). After baseline determination, subjects trained at a high intensity (approximately 90 to 95% of VO2max) for 2 consecutive days. Following the 2 high‐intensity training days, subjects repeated the steady‐state treadmill running and performed another maximal exercise test. After the intense training period, HR was significantly reduced for any given running speed (p < 0.05), with a mean reduction for the four running speeds of 154 ± 7 to 149 ± 7 beats/min. Maximal HR was also significantly reduced following the intense training from 193 ± 12 to 190 ± 9 beats/min (p < 0.05). Measurements of VO2 were unaffected by the acute increase in training intensity. These results suggest that the relationship between HR and V02 is affected by increased training intensity. HR may, therefore, not be an accurate indicator of work intensity following high‐intensity efforts.

This publication has 16 references indexed in Scilit: