Acute Cold and Combined Cold-Hypoxia Exposure on Physical Performance
Description
Data generated from a study aimed to evaluate the effects of acute cold air exposure and the combination of cold air and simulated altitude (hypoxia) on performance during three bouts of repetitive sandbag deadlifts performed to volitional exhaustion. Performance and exertional fatigue were assessed by quantifying the number of repetitions and time to exhaustion in each bout, with blood lactate levels measured from a fingertip sample between bouts. Additionally, we employed a multi-modal approach to evaluate neuromuscular activity and thigh muscle hemodynamics during the deadlift task, using wearable electromyography (EMG) and near-infrared spectroscopy (NIRS) sensors. Through these technologies, we assessed how environmental exposures influenced muscle electrochemical and hemodynamic states, and tracked the progression of fatigue across each sandbag deadlift bout.
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Steps to reproduce
The EMG values were obtained from a Delsys Trigno sensor applied to the participants right vastus lateralis, and exported using EMGworks software. The NIRS values were obtained from a OxyMon MKIII device (Artinis Medical) applied alongside the EMG sensor. The NIRS values were exported using OxySoft software as a text file. Both the EMG and NIRS were analyzed using custom LabVIEW programs that pre-processed and segmented out the EMG and NIRS data. Linear Mixed Effects Models were used to assess changes in EMG and NIRS parameters across environmental conditions and bouts of sandbag deadlifts using SPSS software.