Effects of Active- and Passive-hyperthermia on Isometric Handgrip Strength and Endurance

2020 ◽  
Vol 27 (6) ◽  
pp. 787-795
Author(s):  
Yongsuk Seo ◽  
Jung-Hyun Kim
Keyword(s):  
Handgrip Strength ◽  
Isometric Handgrip ◽  
Passive Hyperthermia

scholarly journals Seasonal Changes in Anthropometry, Body Composition, and Physical Fitness and the Relationships with Sporting Success in Young Sub-Elite Judo Athletes: An Exploratory Study

2020 ◽  
Vol 17 (19) ◽  
pp. 7169
Author(s):  
Olaf Prieske ◽  
Helmi Chaabene ◽  
Martijn Gäbler ◽  
Michael Herz ◽  
Norman Helm ◽  
...  
Keyword(s):  
Body Composition ◽  
Physical Fitness ◽  
Lean Body Mass ◽  
Body Mass ◽  
Exploratory Study ◽  
Handgrip Strength ◽  
Body Height ◽  
Isometric Handgrip ◽  
Balance Test ◽  
Judo Athletes

This exploratory study aimed to monitor long-term seasonal developments in measures of anthropometry, body composition, and physical fitness in young judo athletes, and to compute associations between these measures and sporting success. Forty-four young judoka (20 females, 24 males) volunteered to participate. Tests for the assessment of anthropometry (e.g., body height/mass), body-composition (e.g., lean body mass), muscle strength (isometric handgrip strength), vertical jumping (e.g., countermovement-jump (CMJ) height), and dynamic balance (Y-balance test) were conducted at the beginning and end of a 10-month training season. Additionally, sporting success at the end of the season was recorded for each athlete. Analyses revealed significant time × sex interaction effects for lean-body-mass, isometric handgrip strength, and CMJ height (0.7 ≤ d ≤ 1.6). Post-hoc analyses showed larger gains for all measures in young males (1.9 ≤ d ≤6.0) compared with females (d = 2.4) across the season. Additionally, significant increases in body height and mass as well as Y-balance test scores were found from pre-to-post-test (1.2 ≤ d ≤4.3), irrespective of sex. Further, non-significant small-to-moderate-sized correlations were identified between changes in anthropometry/body composition/physical fitness and sporting success (p > 0.05; −0.34 ≤ ρ ≤ 0.32). Regression analysis confirmed that no model significantly predicted sporting success. Ten months of judo training and/or growth/maturation contributed to significant changes in anthropometry, body composition, and physical fitness, particularly in young male judo athletes.

Local cryostimulation acutely preserves maximum isometric handgrip strength following fatigue in young women

Cryobiology ◽  
2019 ◽  
Vol 87 ◽  
pp. 40-46 ◽  
Author(s):  
Massimo De Nardi ◽  
Sara Silvani ◽  
Piero Ruggeri ◽  
Livio Luzi ◽  
Antonio La Torre ◽  
...  
Keyword(s):  
Young Women ◽  
Handgrip Strength ◽  
Isometric Handgrip

scholarly journals An isoenergetic high-protein, moderate-fat diet does not compromise strength and fatigue during resistance exercise in women

2008 ◽  
Vol 100 (2) ◽  
pp. 283-286 ◽  
Author(s):  
Konstantina Dipla ◽  
Maria Makri ◽  
Andreas Zafeiridis ◽  
Dimitrios Soulas ◽  
Sofia Tsalouhidou ◽  
...  
Keyword(s):  
Resistance Exercise ◽  
Lower Limb ◽  
High Intensity ◽  
Handgrip Strength ◽  
Control Diet ◽  
High Protein Diet ◽  
High Protein ◽  
Lower Limbs ◽  
Protein Diet ◽  
Isometric Handgrip

Resistance exercise is recommended to individuals following high-protein diets in order to augment changes in body composition. However, alterations in macronutrient composition may compromise physical performance. The present study investigated the effects of an isoenergetic high-protein diet on upper and lower limb strength and fatigue during high-intensity resistance exercise. Ten recreationally active women, aged 25–40 years, followed a control diet (55, 15 and 30 % of energy from carbohydrate, protein and fat, respectively) and a high-protein diet (respective values, 30, 40 and 30) for 7 d each in a random counterbalanced design. Each participant underwent strength testing of upper limb (isometric handgrip strength and endurance) and lower limb (four sets of sixteen maximal knee flexions and extensions on an isokinetic dynamometer) before and after applying each diet. Body weight, body fat and RER were significantly reduced following the high-protein diet (P < 0·05). No differences were found between diets in any of the strength performance parameters (handgrip strength, handgrip endurance, peak torque, total work and fatigue) or the responses of heart rate, systolic and diastolic arterial pressure, blood lactate and blood glucose to exercise. Women on a short-term isoenergetic high-protein, moderate-fat diet maintained muscular strength and endurance of upper and lower limbs during high-intensity resistance exercise without experiencing fatigue earlier compared with a control diet.

scholarly journals Effects of brief and prolonged cold application on maximal isometric handgrip strength

2021 ◽  
Author(s):  
Hernán Barra ◽  
Jaime Cancino ◽  
Simón Tapia ◽  
Ignacio Pavez ◽  
Thiare Morales ◽  
...  
Keyword(s):  
Handgrip Strength ◽  
Isometric Handgrip ◽  
Cold Application

Effects of Caffeine Ingestion on Physical Performance in Elite Women Handball Players: A Randomized, Controlled Study

2020 ◽  
Vol 15 (10) ◽  
pp. 1406-1413 ◽  
Author(s):  
Alejandro Muñoz ◽  
Álvaro López-Samanes ◽  
Alberto Pérez-López ◽  
Millán Aguilar-Navarro ◽  
Berta Moreno-Heredero ◽  
...  
Keyword(s):  
Physical Performance ◽  
Handgrip Strength ◽  
Strength Test ◽  
Controlled Study ◽  
Double Blind Study ◽  
Countermovement Jump ◽  
Isometric Handgrip ◽  
Double Blind ◽  
Caffeine Ingestion ◽  
Local Positioning System

Purpose: To investigate the effects of acute caffeine (CAFF) intake on physical performance in elite women handball players. Methods: A total of 15 elite women handball players participated in a randomized, double-blind study. In 2 different trials, participants ingested either a placebo (cellulose) or 3 mg of CAFF per kilogram of body mass (mg/kg bm) before undergoing a battery of neuromuscular tests consisting of handball throws, an isometric handgrip strength test, a countermovement jump, a 30-m sprint test (SV) and a modified version of the agility T test. Then, participants performed a simulated handball game (2 × 20 min), and movement patterns were recorded with a local positioning system. Results: Compared with the placebo, CAFF increased ball velocity in all ball throws (P = .021–.044; effect size [ES] = 0.39–0.49), strength in isometric handgrip strength test (350.8 [41.2] vs 361.6 [46.1] N, P = .034; ES = 0.35), and countermovement-jump height (28.5 [5.5] vs 29.8 [5.5] cm; P = .006; ES = 0.22). In addition, CAFF decreased running time in the SV (4.9 [0.2] vs 4.8 [0.3] s; P = .042; ES = −0.34). In the simulated game, CAFF increased the frequency of accelerations (18.1 [1.2] vs 18.8 [1.0] number/min; P = .044; ES = 0.54), decelerations (18.0 [1.2] vs 18.7 [1.0] number/min; P = .032; ES = 0.56), and body impacts (20 [8] vs 22 [10] impacts/min; P = .032; ES = 0.30). However, postexercise surveys about self-reported feelings of performance indicate that players did not feel increased performance with CAFF. Conclusion: Preexercise ingestion of 3 mg/kg bm of CAFF improved ball-throwing velocity, jump, and sprint performance and the frequency of in-game accelerations and decelerations in elite women handball players.

Effect of Autonomic Responses after Isometric Training at Different Intensities on Obese People

2019 ◽  
Vol 15 ◽  
Author(s):  
Alexis Espinoza-Salinas ◽  
José González-Jurado ◽  
Giovanny Arenas-Sanchez ◽  
Soledad Fuentealba-Sepúlveda ◽  
Isaias Cabezas-Gaete ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Arterial Hypertension ◽  
Pressor Response ◽  
Handgrip Strength ◽  
Excess Weight ◽  
Isometric Handgrip ◽  
Obese People ◽  
Isometric Training ◽  
Muscle Groups ◽  
Small Muscle

Background: Arterial hypertension is among the leading causes of mortality worldwide. The primary non-pharmacological management of arterial hypertension is isometric grip training, which has shown better results than pharmacological methods; however, it has not been thoroughly studied in large muscle groups. Objective: This study compared the pressor response of isometric exercise training at different intensities, in large versus small muscle groups, in sedentary eutrophic and overweight people aged 20-29 years. Methods: A sample of 93 people (57 people with excess weight and 36 people of normal weight) participated in isometric training for 5 days, subdivided into leg press versus Handgrip strength, with different intensities for each subgroup (30 and 50%, 1 RM). Before and after the 5 training days, heart rate variability (HRV) and systolic and diastolic blood pressure, BSBP-BDBP and PSBP-PDBP, were measured to evaluate the state of sympathetic activation at rest and pressor response. Results: Changes with significant differences (p <0.05) in terms of pre-post training measurements in the eutrophic group were the BSBP-PSBP variables at 30% and 50% 1 RM for manual isometric grip strength. In the excess weight group, the only significant change was the PSBP variable in Handgrip strength at 30% 1 RM. It should be noted that in all cases, blood pressure values tended to reduce. Conclusion: Isometric strength exercises in large and small muscle groups show a tendency to reduce blood pressure values; however, the isometric Handgrip force at 30% 1 RM shows statistically significant reductions in blood pressure values.

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