Key result
Mental fatigue induced by 30 minutes of smartphone use prior to resistance exercise significantly impaired inhibitory control response time (p=0.01) in trained male adults, without affecting countermovement jump or heart rate variability.
Why the study?
The effect of mental fatigue induced by smartphone social media apps on inhibitory control, heart rate variability, and high-intensity effort following resistance exercise was unclear.
Does mental fatigue induced by smartphone use before resistance exercise impair inhibitory control, heart rate variability, and countermovement jump in trained adults?
RCT (n=16)
Single-blind
Simple randomization
No
Does mental fatigue induced by smartphone use before resistance exercise impair inhibitory control, heart rate variability, and countermovement jump in trained adults?
Effect estimate: h2 = 0.69
p-value: p=0.01
Mental fatigue induced by smartphone use before resistance exercise impairs inhibitory control response time but does not affect heart rate variability or countermovement jump performance.
Smartphone use before resistance exercise may impair inhibitory control; extends mental fatigue evidence to resistance training contexts.
Background The effect of MF induced by exposure time to social media smartphone apps on inhibitory control, heart rate variability (HRV), and high-intensity physical effort following a resistance exercise session might indicate whether strength and conditioning professionals should suggest avoiding smartphone usage before a resistance exercise session.Aim The objective of this study was to analyze the effect of mental fatigue on inhibitory control, HRV, and countermovement jump (CMJ) in trained adults after resistance exercise.Methods A total of 16 trained males (21.4 ± 3.3 years) volunteered in this study. The participants performed resistance exercises with and without mental fatigue. The Stroop Task, countermovement jump, and heart rate variability were evaluated before and after the resistance exercise. The participants used smartphones in the mental fatigue condition, whereas the participants watched TV in the control condition.Results No condition × time interaction was found for the Stroop accuracy (p = 0.87), CMJ (p = 0.68), SDNN (p = 0.15), or pNN50 (p = 0.15) in the heart rate variability. An interaction was found for Stroop response time (p = 0.01) with a higher response time for the mental fatigue condition (p = 0.01).Conclusions Mental fatigue impaired the inhibitory control performance after a resistance exercise session in trained adults.
No takes yet. Share an insight, caveat, or question.
Lima‐Júnior et al. (2021) conducted an RCT in Healthy trained adults (n=16). Smartphone use (social media apps) vs. Watching TV (Olympic Games documentary) was evaluated on Stroop response time (h2 = 0.69, p=0.01). Mental fatigue induced by 30 minutes of smartphone use prior to resistance exercise significantly impaired inhibitory control response time (p=0.01) in trained male adults, without affecting countermovement jump or heart rate variability.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: