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EMG and heart rate responses decline within 5 days of daily whole-body vibration training with squatting.

Rosenberger A, Liphardt AM, Bargmann A, Müller K, Beck L, Mester J, Zange J - PLoS ONE (2014)

Bottom Line: The heart rate (HR) response was significantly higher (P<0.05) during SE+V than during SE on all training days, but showed a constant decline throughout the training days.On training day 1, blood lactate increased significantly more after SE+V than after SE (P<0.05).On the following training days, this difference became much smaller but remained significantly different.

View Article: PubMed Central - PubMed

Affiliation: Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; Institute of Training Science and Sport Informatics, German Sport University Cologne, Cologne, Germany.

ABSTRACT
In this study, we examined the acute effects of a 5-day daily whole-body vibration (WBV) training on electromyography (EMG) responses of the m. rectus femoris and m. gastrocnemius lateralis, heart rate (HR, continuously recorded), and blood lactate levels. The purpose of the study was to investigate the adaptation of muscle activity, heart rate and blood lactate levels during 5 days of daily training. Two groups of healthy male subjects performed either squat exercises with vibration at 20 Hz on a side alternating platform (SE+V, n = 20, age  = 31.9±7.5 yrs., height  = 178.8±6.2 cm, body mass  = 79.2±11.4 kg) or squat exercises alone (SE, n = 21, age  = 28.4±7.3 years, height  = 178.9±7.4 cm, body mass  = 77.2±9.7 kg). On training day 1, EMG amplitudes of the m. rectus femoris were significantly higher (P<0.05) during SE+V than during SE. However, this difference was no longer statistically significant on training days 3 and 5. The heart rate (HR) response was significantly higher (P<0.05) during SE+V than during SE on all training days, but showed a constant decline throughout the training days. On training day 1, blood lactate increased significantly more after SE+V than after SE (P<0.05). On the following training days, this difference became much smaller but remained significantly different. The specific physiological responses to WBV were largest on the initial training day and most of them declined during subsequent training days, showing a rapid neuromuscular and cardiovascular adaptation to the vibration stimulus.

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Blood lactate changes during squat exercises.The increase in blood lactate levels (means ±SD, mmol·l−1) of all of the subjects during squat exercises in SE+V (○, n = 20) and SE (•, n = 21) on training days 1, 2, 3, 4, and 5. The increase in blood lactate was calculated by the post-training values minus the pre-training values. *Significant difference between SE+V and SE (P<0.05, Tukey's HSD test after ANOVA).
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pone-0099060-g006: Blood lactate changes during squat exercises.The increase in blood lactate levels (means ±SD, mmol·l−1) of all of the subjects during squat exercises in SE+V (○, n = 20) and SE (•, n = 21) on training days 1, 2, 3, 4, and 5. The increase in blood lactate was calculated by the post-training values minus the pre-training values. *Significant difference between SE+V and SE (P<0.05, Tukey's HSD test after ANOVA).

Mentions: The net blood lactate was calculated as the post-exercise values minus the pre-exercise values. On each training day, the SE group resulted in a net blood lactate level of approximately 1 mmol·l−1 (Figure 6). On training day 1, the SE+V group caused a net increase in the blood lactate level of 3.8±2.6 mmol·l−1. This augmented blood lactate level in the SE+V group dropped to a net increase of 1.9±1.9 mmol·l−1 on training day 2, and it remained almost constant at that level on the following training days. On training days 1, 2, 4, and 5, the net blood lactate levels in the SE+V group were significantly higher than in the SE group.


EMG and heart rate responses decline within 5 days of daily whole-body vibration training with squatting.

Rosenberger A, Liphardt AM, Bargmann A, Müller K, Beck L, Mester J, Zange J - PLoS ONE (2014)

Blood lactate changes during squat exercises.The increase in blood lactate levels (means ±SD, mmol·l−1) of all of the subjects during squat exercises in SE+V (○, n = 20) and SE (•, n = 21) on training days 1, 2, 3, 4, and 5. The increase in blood lactate was calculated by the post-training values minus the pre-training values. *Significant difference between SE+V and SE (P<0.05, Tukey's HSD test after ANOVA).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4048290&req=5

pone-0099060-g006: Blood lactate changes during squat exercises.The increase in blood lactate levels (means ±SD, mmol·l−1) of all of the subjects during squat exercises in SE+V (○, n = 20) and SE (•, n = 21) on training days 1, 2, 3, 4, and 5. The increase in blood lactate was calculated by the post-training values minus the pre-training values. *Significant difference between SE+V and SE (P<0.05, Tukey's HSD test after ANOVA).
Mentions: The net blood lactate was calculated as the post-exercise values minus the pre-exercise values. On each training day, the SE group resulted in a net blood lactate level of approximately 1 mmol·l−1 (Figure 6). On training day 1, the SE+V group caused a net increase in the blood lactate level of 3.8±2.6 mmol·l−1. This augmented blood lactate level in the SE+V group dropped to a net increase of 1.9±1.9 mmol·l−1 on training day 2, and it remained almost constant at that level on the following training days. On training days 1, 2, 4, and 5, the net blood lactate levels in the SE+V group were significantly higher than in the SE group.

Bottom Line: The heart rate (HR) response was significantly higher (P<0.05) during SE+V than during SE on all training days, but showed a constant decline throughout the training days.On training day 1, blood lactate increased significantly more after SE+V than after SE (P<0.05).On the following training days, this difference became much smaller but remained significantly different.

View Article: PubMed Central - PubMed

Affiliation: Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; Institute of Training Science and Sport Informatics, German Sport University Cologne, Cologne, Germany.

ABSTRACT
In this study, we examined the acute effects of a 5-day daily whole-body vibration (WBV) training on electromyography (EMG) responses of the m. rectus femoris and m. gastrocnemius lateralis, heart rate (HR, continuously recorded), and blood lactate levels. The purpose of the study was to investigate the adaptation of muscle activity, heart rate and blood lactate levels during 5 days of daily training. Two groups of healthy male subjects performed either squat exercises with vibration at 20 Hz on a side alternating platform (SE+V, n = 20, age  = 31.9±7.5 yrs., height  = 178.8±6.2 cm, body mass  = 79.2±11.4 kg) or squat exercises alone (SE, n = 21, age  = 28.4±7.3 years, height  = 178.9±7.4 cm, body mass  = 77.2±9.7 kg). On training day 1, EMG amplitudes of the m. rectus femoris were significantly higher (P<0.05) during SE+V than during SE. However, this difference was no longer statistically significant on training days 3 and 5. The heart rate (HR) response was significantly higher (P<0.05) during SE+V than during SE on all training days, but showed a constant decline throughout the training days. On training day 1, blood lactate increased significantly more after SE+V than after SE (P<0.05). On the following training days, this difference became much smaller but remained significantly different. The specific physiological responses to WBV were largest on the initial training day and most of them declined during subsequent training days, showing a rapid neuromuscular and cardiovascular adaptation to the vibration stimulus.

Show MeSH