| Title: |
Submaximal heart rate seems inadequate to
prescribe and monitor intensified training |
| Author(s): |
Twan ten Haaf, Carl Foster, Romain Meeusen, Bart Roelands, Maria Francesca Piacentini, Selma van Staveren, Leo Koenderman and Jos J. de Koning |
| Journal: |
European Journal of Sport Science |
| Year: |
2019 |
| Volume: |
19 |
| Issue: |
8 |
| Pages: |
1082-1091 |
| Affiliation: |
Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam,
Amsterdam, Netherlands |
| DOI: |
10.1080/17461391.2019.1571112 |
| ISSN: |
1746-1391 |
| File URL: |
/vuams-pubs/Submaximal_heart_rate_seems_inadequate_to_prescribe_and_monitor_intensified_training.pdf |
| Keywords: |
Overtraining, endurance, fatigue, performance, physiology |
| Abstract: |
The aim of this study is to investigate whether the change in (sub)maximal heart rate after intensified training is associated
with the change in performance. Thirty subjects were recruited who performed cardiopulmonary exercise tests to
exhaustion 2 weeks before (pre), 1 week after (post) and 5 weeks after (follow-up) an 8-day non-competitive amateur
cycling event (TFL). The exercise volume during the TFL was 7.7 fold the volume during the preparation period. Heart
rate and cardiopulmonary parameters were obtained at standardised absolute submaximal workloads (low, medium and
high intensity) and at peak level each test. Subjects were classified as functionally overreached (FOR) or acute fatigued
(AF) based on the change in performance. No differences between FOR and AF were observed for heart rate (P = .51).
On total group level (AF + FOR), post-TFL heart rate decreased significantly at low (?4.4 beats·min?1, 95% CI [?8.7,
?0.1]) and medium (?5.5 beats·min?1 [?8.5, ?2.4]), but not at high intensity. Peak heart rate decreased ?3.4
beats·min?1 [?6.1, ?0.7]. O2pulse was on average 0.49 ml O2·beat?1 [0.09, 0.89] higher at all intensities after intensified
training. No changes in V?O2 (P = .44) or the ventilatory threshold (P = .21) were observed. Pearson’s correlation
coefficients revealed negative associations between heart rate and O2pulse at low (r = ?.56, P < .01) and medium intensity
(r = ?.54, P < .01), but not with V?O2 or any other submaximal parameter. (Sub)maximal heart rate decreased after the
TFL. However, this decrease is unrelated to the change in performance. Therefore, heart rate seems inadequate to
prescribe and monitor intensified training. |
