Journal of Strength and Conditioning Research This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Comparison of Indirect Calorimetry and Common Prediction Equations for Evaluating Changes in Resting Metabolic Rate Induced by Resistance Training and a Hypercaloric Diet
Rodriguez, C, Harty, PS, Stratton, MT, Siedler, MR, Smith, RW, Johnson, BA, Dellinger, JR, Williams, AD, White, SJ, Benavides, ML, and Tinsley, GM. Comparison of indirect calorimetry and common prediction equations for evaluating changes in resting metabolic rate induced by resistance training and a hypercaloric diet. J Strength Cond Res 36(11): 3093–3104, 2022—The ability to accurately identify resting metabolic rate (RMR) changes over time allows practitioners to prescribe appropriate adjustments to nutritional intake. However, there is a lack of data concerning the longitudinal utility of commonly used RMR predictio...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Kinesio Taping and Transcutaneous Electrical Nerve Stimulation Combined With Active Stretching on Hamstring Flexibility
In conclusion, both KT and TENS in combination with AS may increase ROM more than AS alone, and the improvements obtained using KT with AS and TENS with AS may be similar. (Source: Journal of Strength and Conditioning Research)
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Acute High-Intensity Interval Training on Information Processing Speed
This study investigated the effects of acute exercise on reaction time (RT), premotor time (i.e., central processing), and motor time (i.e., peripheral processing) using surface electromyography to fractionate RT. Fifty-eight young adults (27 men, 31 women) between the age of 18 and 40 years participated in 2 testing sessions. During visit one, subjects performed a simple RT task under regular (i.e., consistent timing) and irregular (i.e., variable timing) foreperiods. Subjects were then randomized to either an aerobic-only high-intensity interval training (HIIT) group (HIIT-A), an aerobic/resistance HIIT group (HIIT-AR), ...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Oral Contraceptive Use Impairs Muscle Gains in Young Women
We examined the effects of OCs on muscle responses to a standardized resistance exercise training (RET) program. Two groups of young healthy women (18–29 years old, non-OC: n = 38, OC: n = 34) underwent 10 weeks of whole-body RET (3 days·wk−1, 3 sets, 6–10 repetitions, at 75% of maximum strength, 13 exercises). Body composition was determined using hydrostatic weighing, and blood samples were taken before and after training to measure dehydroepiandrosterone (DHEA), DHEA sulfate (DHEAS), IGF-1, and cortisol levels. There were significant differences in lean mass gains between the groups (non-OC: 3.5 ± 0.4% vs. OC: 2...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Supplemental O2 During Recovery Does Not Improve Repeated Maximal Concentric-Eccentric Strength-Endurance Performance in Hypoxia
Dünnwald, T, Morawetz, D, Faulhaber, M, Gatterer, H, Birklbauer, C, Koller, A, Weiss, G, and Schobersberger, W. Supplemental O2 during recovery does not improve repeated maximal concentric-eccentric strength-endurance performance in hypoxia. J Strength Cond Res 36(11): 3065–3073, 2022—An alpine ski racing training session typically includes repeated bouts of maximal exercise at high altitude. We evaluated whether hyperoxic recovery between 5 sets of high-intensity strength-endurance exercises, which resembled ski racing activity and were performed in hypoxia, has beneficial effects on performance and acid-base status....
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Different Velocity Loss Thresholds on Passive Contractile Properties and Muscle Oxygenation in the Squat Exercise Using Free Weights
Muñoz-López, A, Marín-Galindo, A, Corral-Pérez, J, Costilla, M, Sánchez-Sixto, A, Sañudo, B, Casals, C, and Ponce-González, JG. Effects of different velocity loss thresholds on passive contractile properties and muscle oxygenation in the squat exercise using free weights. J Strength Cond Res 36(11): 3056–3064, 2022—The current study assessed the impact between different velocity loss thresholds on changes in the muscle contractile properties and muscle oxygenation after a single resistance training (RT) session. Thirty physically active men participated in a crossover study performing 3 sets of the squat exercis...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Anodal Transcranial Direct Current Stimulation on Training Volume and Pleasure Responses in the Back Squat Exercise Following a Bench Press
This study aimed to investigate the effects of anodal transcranial direct current stimulation (a-tDCS) on volume-load and pleasure responses in a back squat following a bench press. Twelve male subjects advanced in resistance training (RT) (age, 25.5 ± 4.4 years) completed 2 experimental trials in a counterbalanced crossover design: a-tDCS and sham conditions. The stimulus was applied over the left dorsolateral prefrontal cortex for 20 minutes using a 2-mA current intensity in a-tDCS condition and 1 minute of active stimulus in the sham condition. Immediately after stimulation, subjects performed the bench press followed ...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Effects of Eccentric Single-Leg Decline Squat Training Performed With Different Execution Times on Maximal Strength and Muscle Contraction Properties of the Knee Extensor Muscles
Abián-Vicén, J, Martínez, F, Jiménez, F, and Abián, P. Effects of eccentric single-leg decline squat training performed with different execution times on maximal strength and muscle contraction properties of the knee extensor muscles. J Strength Cond Res 36(11): 3040–3047, 2022—The eccentric phase of the single-leg decline squat (SLDSe) has been described as a method to maximally load the knee extensor and has been used as an easy and effective rehabilitation exercise for patellar tendinopathy. The purpose of this study was to examine the impact of 6-week SLDSe training with 2 technical execution times on changes ...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Does Varying Resistance Exercises for the Same Muscle Group Promote Greater Strength Gains?
Costa, BDV, Kassiano, W, Nunes, JP, Kunevaliki, G, Castro-E-Souza, P, Sugihara-Junior, P, Fernandes, RR, Cyrino, ES, and de Fortes, LS. Does varying resistance exercises for the same muscle group promote greater strength gains? J Strength Cond Res 36(11): 3032–3039, 2022—Two of the foremost principles of progression are progressive overload and variation. A way to vary within a resistance training (RT) program is to perform different exercises for the same muscle group; however, this strategy is still overlooked. The purpose of the present study was to compare strength adaptations between an RT routine that maintained ...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Including the Eccentric Phase in Resistance Training to Counteract the Effects of Detraining in Women: A Randomized Controlled Trial
Coratella, G, Beato, M, Bertinato, L, Milanese, C, Venturelli, M, and Schena, F. Including the eccentric phase in resistance training to counteract the effects of detraining in women: a randomized controlled trial. J Strength Cond Res 36(11): 3023–3031, 2022—The current study compared the effects of concentric-based (CONC), eccentric-based (ECC), and traditional concentric-eccentric (TRAD) resistance training on muscle strength, mass, and architecture and the postdetraining retention of the training-induced effects in women. Sixty women were randomly assigned to unilateral volume-equated CONC, ECC, or TRAD knee extensi...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Traditional 3- to 5-Minute Interset Rest Periods May Not Be Necessary When Performing Fewer Repetitions Per Set: Using Clean Pulls as an Example
Jukic, I and Tufano, JJ. Traditional 3- to 5-minute interset rest periods may not be necessary when performing fewer repetitions per set: Using clean pulls as an example. J Strength Cond Res 36(11): 3015–3022, 2022—Three to 5 minutes of interset rest is often recommended for power-based exercises, but those recommendations are largely based on performing many repetitions per set, which can induce fatigue and require such lengthy rest periods. If the number of repetitions per set is reduced before fatigue ensues, interset rest periods may also be reduced without sacrificing performance. Therefore, the purpose of this st...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Intra- and Interday Reliability of Weightlifting Variables and Correlation to Performance During Cleans
Sorensen, AM, Chavda, S, Comfort, P, Lake, J, and Turner, AN. Intra- and interday reliability of weightlifting variables and correlation to performance during cleans. J Strength Cond Res 36(11): 3008–3014, 2022—The purpose of this investigation was to examine intra- and interday reliability of kinetic and kinematic variables assessed during the clean, assess their relationship to clean performance, and determine their suitability in weightlifting performance analysis. Eight competitive weightlifters performed 3 sets of single repetition cleans with 90% of their 1-repetition maximum (1RM). Force-time data were collected...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Reliability of the Squat Jump Force-Velocity and Load-Velocity Profiles
Kotani, Y, Lake, J, Guppy, SN, Poon, W, Nosaka, K, Hori, N, and Haff, GG. The reliability of the squat jump force-velocity and load-velocity profiles. J Strength Cond Res 36(11): 3000–3007, 2022—The purpose of this study was to investigate the between-session reliability of the squat jump force-velocity (FV) and load-velocity (LV) profiles. Eighteen subjects (age = 28.1 ± 4.8 years; height = 1.7 ± 9.7; body mass = 74.7 ± 12.8) who could back squat>1.5 times body mass participated in this study. Each subject completed a familiarization session, followed by 2 experimental sessions each separated by 72 hours. Subjects ...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Level of Effort: A Reliable and Practical Alternative to the Velocity-Based Approach for Monitoring Resistance Training
This study analyzed the potential of the level of effort methodology as an accurate indicator of the programmed relative load (percentage of one-repetition maximum [%1RM]) and intraset volume of the set during resistance training in the bench press, full squat, shoulder press, and prone bench pull exercises, through 3 specific objectives: (a) to examine the intersubject and intrasubject variability in the number of repetitions to failure (nRM) against the actual %1RM lifted (adjusted by the individual velocity), (b) to investigate the relationship between the number of repetitions completed and velocity loss reached, and (...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research

Acute Mechanical, Neuromuscular, and Metabolic Responses to Different Set Configurations in Resistance Training
Piqueras-Sanchiz, F, Cornejo-Daza, PJ, Sánchez-Valdepeñas, J, Bachero-Mena, B, Sánchez-Moreno, M, Martín-Rodríguez, S, García-García, Ó, and Pareja-Blanco, F. Acute mechanical, neuromuscular, and metabolic responses to different set configurations in resistance training. J Strength Cond Res 36(11): 2983–2991, 2022—The aim of this study was to investigate the effect of set configuration on mechanical performance, neuromuscular activity, metabolic response, and muscle contractile properties. Sixteen strength-trained men performed 2 training sessions in the squat exercise consisting of (a) 3 sets of 8 repetitions ...
Source: Journal of Strength and Conditioning Research - October 28, 2022 Category: Sports Medicine Tags: Original Research Source Type: research