scholarly journals Acute responses of high-intensity circuit training in women: Low physical fitness levels show higher muscle damage

2019 ◽  
Vol 20 (5) ◽  
pp. 391-401 ◽  
Author(s):  
Aline Bianca Alves Nasci ◽  
Rafael Bueno Orcy ◽  
Léo Dutra Cabistany ◽  
Andressa Formalioni ◽  
Fabrício Boscolo Del Vecchio
Keyword(s):  
Physical Fitness ◽  
Muscle Damage ◽  
High Intensity ◽  
Intermittent Exercise ◽  
Serum Lactate ◽  
Acute Effects ◽  
Exercise Protocol ◽  
Circuit Training ◽  
Acute Responses ◽  
Before And After

High-intensity intermittent exercise (HIIE) elicits large improvements in health and cardiorespiratory fitness (CRF). HIIE can be applied with calisthenics exercises to improve strength and endurance. The acute effects of high-intensity circuit training (HICT) considering different CRF on myological variables are unknown. The aim was measure acute effects of HICT in young women considering different levels of CRF. Twelve women were allocated in two groups, who achieve 41mLO2•kg-1•min-1 or more= High Physical Fitness (HPF, n=5) and who achieve less than 41mLO2•kg-1•min-1= Low Physical Fitness (LPF,n=7). Protocol: 2x4 sets of 20 seconds at maximum intensity (all-out fashion) interspersed with 10 seconds of passive rest (jumping jacks, squat and thrust using 2kg dumbbells, mountain climber, and burpees). Blood samples were collected before, immediately after, 15minutes, 30minutes, one hour and 24 hours after. Heart rate, serum myoglobin, lactate, and creatine kinase (CK) concentration were analyzed. The HR achieved 94.1±3.7% of HRmax for LPF and 104.5±20.3% for HPF, p=0.03. The mean of delta lactate was similar between groups. The highest myoglobin has reached at 1h after the exercise protocol, with 50.0±30.2 ng/mL for LPF and 36.9±9.25 ng/mL for HPF. The delta of total CK before and after the exercise protocol shows that the serum CK level in LPF was significantly higher than HPF group (p=0.042). HICT composed by calisthenic protocol produced elevated and similar effects on HRmax, serum lactate and myoglobin in the woman with HPF and LPF. However, LPF group presented higher muscle damage inferred by serum CK concentrations.

scholarly journals AN EFFECTIVE HIGH-INTENSITY INTERMITTENT EXERCISE PROTOCOL FOR DECREASING SKELETAL MUSCLE GLYCOGEN

2011 ◽  
Vol 60 (5) ◽  
pp. 493-502 ◽  
Author(s):  
KEISUKE SHIOSE ◽  
TAKURO TOBINA ◽  
YASUKI HIGAKI ◽  
AKIRA KIYONAGA ◽  
HIROAKI TANAKA
Keyword(s):  
Skeletal Muscle ◽  
Muscle Glycogen ◽  
High Intensity ◽  
Intermittent Exercise ◽  
Exercise Protocol ◽  
Skeletal Muscle Glycogen

The Acute Effects of Supramaximal High-Intensity Intermittent Exercise on Vascular Function in Lean vs. Obese Prepubescent Boys

2015 ◽  
Vol 27 (4) ◽  
pp. 503-509 ◽  
Author(s):  
Napasakorn Chuensiri ◽  
Hirofumi Tanaka ◽  
Daroonwan Suksom
Keyword(s):  
Energy Expenditure ◽  
Total Energy ◽  
Exercise Intensity ◽  
High Intensity ◽  
Vascular Function ◽  
Intermittent Exercise ◽  
Total Energy Expenditure ◽  
Obese Group ◽  
Acute Effects ◽  
Lean Group

Purpose:To determine the acute effects of high-intensity intermittent exercise (HIIE) on vascular function.Methods:Lean (n = 18, BMI = 17.1 ± 0.7) and obese (n = 17, BMI = 25.4 ± 0.8) prepubescent boys aged 10.2 ± 0.2 years were studied. HIIE consisted of 8 sets of 20 s of cycle ergometry at 100, 130, and 170% of VO2peak alternating with 10 s of rests.Results:The obese group had higher (p < .05) body mass, BMI, body fat percentage, waist-hip ratio than the lean group. Carotid artery wall thickness and arterial stiffness as assessed by brachial-ankle pulse wave velocity (baPWV) were greater in the obese than in the lean group (p < .05). Brachial artery flow-mediated dilation (FMD) was not different between the groups. Total energy expenditure increased gradually as the exercise intensity increased in both groups (p < .05). The obese group had significantly greater total energy expenditure in all three HIIE intensities than the lean group. FMD tended to be higher and baPWV lower as the exercise intensity increased in both groups. Only the HIIE at 170% demonstrated greater FMD compared with the baseline in both groups. baPWV decreased significantly after HIIE at 130 and 170% VO2peak in both groups.Conclusion:Supramaximal HIIE can be a feasible exercise modality for improving vascular function in obese prepubescent boys. Future exercise intervention studies are warranted.

scholarly journals Whole-body cryotherapy (−110 °C) following high-intensity intermittent exercise does not alter hormonal, inflammatory or muscle damage biomarkers in trained males

Cytokine ◽  
2019 ◽  
Vol 113 ◽  
pp. 277-284 ◽  
Author(s):  
Malte Krueger ◽  
Joseph T. Costello ◽  
Silvia Achtzehn ◽  
Karl-Heinrich Dittmar ◽  
Joachim Mester
Keyword(s):  
Muscle Damage ◽  
High Intensity ◽  
Intermittent Exercise ◽  
Whole Body ◽  
Whole Body Cryotherapy

scholarly journals The acute effects of high-intensity jack-knife stretching on the flexibility of the hamstrings

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kosuke Takeuchi ◽  
Kazunori Akizuki ◽  
Masatoshi Nakamura
Keyword(s):  
High Intensity ◽  
Rating Scale ◽  
Numerical Rating Scale ◽  
Knee Extension ◽  
Acute Effects ◽  
Safe Method ◽  
Passive Torque ◽  
Before And After ◽  
Numerical Rating ◽  
Healthy Participants

AbstractThe purpose of the present study was to examine the acute effects of high-intensity jack-knife stretching for 60 s on flexibility of the hamstrings. Twelve healthy participants underwent jack-knife stretching for 60 s (3 repetitions of 20 s stretching with 30 s intervals) at two different intensities based on the point of discomfort (POD and PODmax). To examine any change in flexibility, knee extension range of motion (ROM), passive torque at end ROM, and muscle–tendon unit stiffness were measured before and after stretching. To evaluate hamstrings pain, a numerical rating scale (NRS) was described. The knee extension ROM (p < 0.01) and passive torque at end ROM (p < 0.05) were significantly increased at both intensities. The muscle–tendon unit stiffness was significantly decreased in PODmax intensity (p < 0.01), but there was no change in POD intensity (p = 0.18). The median values of NRS during the stretching were 0 and 6–7 in POD and PODmax intensity, respectively, although it was 0 immediately after the stretching protocol in both intensities. These data suggested that high-intensity jack-knife stretching is an effective and safe method to decrease muscle–tendon unit stiffness of the hamstrings.

scholarly journals Purslane supplementation lowers oxidative stress, inflammatory and muscle damage biomarkers after high-intensity intermittent exercise in female runners

2021 ◽  
Vol 13 (1) ◽  
pp. 17-27
Author(s):  
ANIS CHARKHI SAHL ABAD ◽  
AMINE GRAM ◽  
RAHMAN SOORI ◽  
ALI AKBARNEJAD ◽  
FATEMEH AZIZI GHUCHAN ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Muscle Damage ◽  
High Intensity ◽  
Intermittent Exercise ◽  
Interval Exercise ◽  
Tnf Α ◽  
Healthy Female ◽  
High Intensity Interval ◽  
Treadmill Protocol ◽  
Biomarkers Of Oxidative Stress

Background: The aim of this study was to determine the effect of purslane supplementation on oxidative stress, inflammation and muscle damage biomarkers after completing high-intensity interval exercise (HIIE). Methods: Nine healthy female runners completed a HIIE treadmill protocol comprising 1 min at 100% of the peak treadmill velocity attained in a preliminary exhaustive incremental treadmill test, interspersed by 1 min of passive recovery, until they had run for 2.5 km. Athletes repeated this test following 10 days of supplementation with 1000 mg per day of purslane. Results: At baseline (i.e., absence of purslane supplementation) the HIIE protocol increased 9-HODE (p < 0.001), 13-HODE (p < 0.001), IL-17 (p < 0.001), TNF-α (p < 0.001), and LDH (p < 0.001). After purslane consumption, resting 9-HODE, 13-HODE, IL-17, TNF-α, and LDH were lowered (p < 0.001) and IL-10 was increased (p < 0.001) compared to before purslane supplementation. After purslane consumption and following the HIIE protocol, the responses of these biomarkers were lower compared to baseline (p < 0.001). Conclusion: Ten days of purslane supplementation blunted the perturbation to biomarkers of oxidative stress, inflammation and muscle damage in female runners completing a HIIE protocol.

Effect of a High-Intensity Intermittent-Exercise Protocol on Neurocognitive Function in Healthy Adults: Implications for Return-to-Play Management After Sport-Related Concussion

2015 ◽  
Vol 24 (4) ◽  
Author(s):  
Enda F. Whyte ◽  
Nicola Gibbons ◽  
Grainne Kerr ◽  
Kieran A. Moran
Keyword(s):  
Test Scores ◽  
High Intensity ◽  
Intermittent Exercise ◽  
Neurocognitive Function ◽  
Stroop Interference ◽  
Return To Play ◽  
Exercise Protocol ◽  
Significant Time ◽  
Interference Test ◽  
Condition Interaction

Context: Determination of return to play (RTP) after sport-related concussion (SRC) is critical given the potential consequences of premature RTP. Current RTP guidelines may not identify persistent exercise-induced neurocognitive deficits in asymptomatic athletes after SRC. Therefore, postexercise neurocognitive testing has been recommended to further inform RTP determination. To implement this recommendation, the effect of exercise on neurocognitive function in healthy athletes should be understood. Objective: To examine the acute effects of a high-intensity intermittent-exercise protocol (HIIP) on neurocognitive function assessed by the Symbol Digits Modality Test (SDMT) and Stroop Interference Test. Design: Cohort study. Setting: University laboratory. Participants 40 healthy male athletes (age 21.25 ± 1.29 y, education 16.95 ± 1.37 y). Intervention: Each participant completed the SDMT and Stroop Interference Test at baseline and after random allocation to a condition (HIIP vs control). A mixed between-within-subjects ANOVA assessed time- (pre- vs postcondition) -by-condition interaction effects. Main Outcome Measures: SDMT and Stroop Interference Test scores. Results: There was a significant time-by-condition interaction effect (P < .001, η2 = .364) for the Stroop Interference Test scores, indicating that the HIIP group scored significantly lower (56.05 ± 9.34) postcondition than the control group (66.39 ± 19.6). There was no significant time-by-condition effect (P = .997, η2 < .001) for the SDMT, indicating that there was no difference between SDMT scores for the HIIP and control groups (59.95 ± 10.7 vs 58.56 ± 14.02). Conclusions: In healthy athletes, the HIIP results in a reduction in neurocognitive function as assessed by the Stroop Interference Test, with no effect on function as assessed by the SDMT. Testing should also be considered after high-intensity exercise in determining RTP decisions for athletes after SRC in conjunction with the existing recommended RTP protocol. These results may provide an initial reference point for future research investigating the effects of an HIIP on the neurocognitive function of athletes recovering from SRC.

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