The Effect of a Resistance Training Session on Physiological and Thermoregulatory Measures of Sub-maximal Running Performance in the Heat in Heat-Acclimatized Men

Abstract

Background The current study examined the acute effects of a lower body resistance training (RT) session on physiological and thermoregulatory measures during a sub-maximal running protocol in the heat in heat-acclimatized men. Ten resistance-untrained men (age 27.4 ± 4.1 years; height 1.78 ± 0.06 m; body mass 76.8 ± 9.9 kg; peak oxygen uptake 48.2 ± 7.0 mL kg −1 min −1 ) undertook a high-intensity RT session at six-repetition maximum. Indirect muscle damage markers (i.e., creatine kinase [CK], delayed-onset muscle soreness [DOMS], and countermovement jump [CMJ]) were collected prior to, immediately post and 24 and 48 h after the RT session. The sub-maximal running protocol was performed at 70% of the ventilatory threshold, which was conducted prior to and 24 and 48 h following the RT session to obtain physiological and thermoregulatory measures. Results The RT session exhibited significant increases in DOMS ( p < 0.05; effect size [ES]: 1.41–10.53), whilst reduced CMJ ( p < 0.05; ES: − 0.79–1.41) for 48 h post-exercise. There were no differences in CK ( p > 0.05), although increased with moderate to large ES (0.71–1.12) for 48 h post-exercise. The physiological cost of running was increased for up to 48 h post-exercise ( p < 0.05) with moderate to large ES (0.50–0.84), although no differences were shown in thermoregulatory measures ( p > 0.05) with small ES (0.33). Conclusion These results demonstrate that a RT session impairs sub-maximal running performance for several days post-exercise, although thermoregulatory measures are unperturbed despite elevated muscle damage indicators in heat-acclimatized, resistance untrained men. Accordingly, whilst a RT session may not increase susceptibility to heat-related injuries in heat-acclimatized men during sub-maximal running in the heat, endurance sessions should be undertaken with caution for at least 48 h post-exercise following the initial RT session in resistance untrained men.

Muscle Damage and Performance after Single and Multiple Simulated Matches in University Elite Female Soccer Players

“…CMJ was considered to be a marker of muscle damage, according to previous studies [ 29 , 30 , 31 ], although CMJ is also used as a performance measure in soccer studies [ 2 , 32 ]. The participant stood erect with a knee angle of 0° (0° = full knee extension) with hands on hips and performed a countermovement until the knee angle reached an approximate 90° angle, followed immediately by a vertical jump as high as possible [ 33 , 34 , 35 ].…”

Resistance Training Acutely Impairs Agility and Spike-Specific Performance Measures in Collegiate Female Volleyball Players Returning from the Off-Season

“…The DOMS for each muscle group was assessed with the following technique: DOMSQuad-isometric contraction of the right quadricep muscles with the knee in an extended position; DOMSGts-isometrically contracting the gluteal muscles in a standing position; DOMSTri-performance of one push-up; DOMSAbs-performance of one sit-up; and DOMSSqt-overall lower body soreness during one bodyweight squat. The level of DOMS was assessed using a visual analogue scale from 1-10, with 1 defined as "no soreness" and 10 as "very, very sore" [15,21]. The lower body range of movement was assessed using a standard sit-and-reach (SR) test [24].…”

“…Studies have reported high levels of EIMD with concomitant impairments in running economy [15][16][17], running time-trial performance [18], and cycling performance [19] for several days following a bout of resistance exercises. These findings suggest that a bout of RT may impair the quality of subsequent endurance training sessions as a result of EIMD symptoms [10].…”

Effect of Exercise-Induced Muscle Damage on Bowling-Specific Motor Skills in Male Adolescent Cricketers

“…Common symptoms resulting from EIMD include muscle soreness, muscle stiffness and swelling, and a reduction of muscular contractility for several days post-exercise [ 7 , 8 ]. Following resistance training, EIMD has been reported to impair generic physical performance measures, including maximal isometric contractions [ 9 , 10 ], vertical jump [ 5 ], running economy [ 4 , 11 ], and cycling performance [ 12 ] for 24–48 h post-exercise. More recently, studies have reported attenuation in sport-specific performance measures, including skating performance in ice hockey players [ 13 ], repeated sprint ability in basketball players [ 14 ] and agility performance in volleyball players [ 15 ] during periods of EIMD.…”