The Acute Physiological Effect of Caffeine on HIIT Training among Normal Weight Young Adults

Soh, Kae Yee (2023) The Acute Physiological Effect of Caffeine on HIIT Training among Normal Weight Young Adults. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

The purpose of this study was to examine the acute physiological effect of caffeine on HIIT training among normal weight young adults. A total of 15 normal weight young adults (age: 21.33 ± 2.02 years; weight: 66.58 ± 10.18 kg; height: 168.03 ± 5.72 cm; SMM: 29.23 ± 4.97 kg; PBF: 21.19 ± 8.56 %; VO2max 32.81 ± 8.33 ml.kg.min-1 ) from Tunku Abdul Rahman University College were recruited in this study. They undertook 2 experimental trials which included 1 CAF trial (5kg/BW) and 1 PLA trial (decaffeinated coffee) 60 min prior to the HIIT training (20 min of interval training with cycling to rest ratio of 10/50 s at ≥90% HRpeak). Each test was separated at least 7 days apart. Results showed that Cardiorespiratory (Blood Pressure & Heart Rate) responses have no significance changes (p>0.05). But the VO2 responses there is a significance effect towards HIIT training between CAF and PLA trails (p < 0.05). Blood Glucose showed that there was a significant effect towards HIIT training between CAF and PLA trails (p < 0.05). Results showed that there was no significant difference in the Body Composition (Skeletal Muscle Mass, Percentage of Body Fat, Body Mass & Extracellular Water) responses towards HIIT training between CAF and PLA (p>0.05). Results also showed that there was no significant difference in the Rating of Perceived Exertion (RPE) responses towards HIIT training between CAF and PLA (p>0.05) In conclusion, the present study demonstrates the ingestion of caffeine (5mg/BW) 60 min prior to the testing improved VO2max and reduce the usage of blood glucose towards exercise