Abstrakt
The aim of the study was to compare heart-rate recovery (HRR) during inactive recovery in three positions of the body (upright seated position, horizontal supine position and decline supine position) in trained participants after load on aerobic threshold. Material and method The sample consisted of 16 subjects (age = 21.5+-1.4 years, body height 178.5+-6.7 cm, body weight 77.5+-5.9 kg).
The participants ran on the spot on a soft gymnastics mat for 3 minutes to reach and keep aerobic threshold during the last minute. For the next 2 minutes, the participants relaxed in the defined position of sitting on a mat (R1), lying on a mat (R2) or lying on the decline plane (R3) where the angle to the mat was 30 degrees.
HRR was measured immediately after load (T1) and during the recovery phase in 16 second intervals (T2), in 30 s (T3), 60 s (T4) and 120 s (T5) after the cessation of exercise. Results Multiple analysis of variance showed a significant effect of two main factors on differences in heart rate (time: F2.2,97.5 = 565.44, p<0.01, η2 = 0.93, recovery: F2,45 = 4.98, p < 0.05, η2 = 0.18).
Post-hoc analysis revealed significant differences in HRR under the influence of time in each type of recovery up to T4 (60 s). While sitting (R1), a significant decrease in HRR between T4 (89.25 +- 10.92 beats.min-1) and T5 (80.38 +- 11.88 beats.min-1) (p < 0.01) was found; in the horizontal supine position (R2: 82.00 +- 11.92 vs. 80.31 +- 13.51 beats.min-1) and decline supine position (R3: 80.19+-9.66 vs. 77.25+-11.56 beats.min-1) no significant changes appeared.
Discussions and conclusions The results showed a significant effect of time and body posture on recovery processes. A higher level of HRR was detected in supine positions compared to the seated position in the first minute of recovery.