EFFECTS OF COMBINED SAGO–SOY SUPPLEMENTATION ON CYCLING TIME TRIAL PERFORMANCE IN THE HEAT

To investigate the effects of sago (daily used local food containing mostly CHO), soy (daily used local food containing PRO), and iso–caloric sago+soy combined (CHO and PRO combined supplementation) supplementation during a 90–min endurance cycling at 60 % of VO2max on cycling performance, plasma concentrations of glucose, insulin, free fatty acids, and lactate, F2-Isoprostanes, creatine kinase in the heat, as compared to placebo.

The sample size of the current study was calculated by using PS Power and Sample Size Calculation v.2.1.30 (Dupont and Plummer Jr, 2010). In this research, a randomised single–blind, placebo–controlled cross–over trial was applied. The participants for this study were chosen randomly from the Kelantan cycling team. In this study 12 males selected as participants were moderately trained, heat–adapted cyclists. Heat–adaptation in these participants was obtained through existing regular training in a tropical environment (~31 °C; 70 % relative humidity). They have participated in local cycling competitions and were training regularly (three training sessions per week).

This study was done in Sports Science Unit, School of Medical Sciences, Health Campus, Universiti Sains Malaysia in Kota Bharu city.

between 15 – 30 years old, Non–smoker, Non–diabetic, Not using dietary supplements, two years of experience in cycling.

There were four separate trials that were included: Sago-7.5% sago supplement Soy-7.5% soy supplement Sago+Soy-- 6%sago+1.5% soy supplement Placebo Therefore, each participant ingested one of them during each trial.

20-km time-trial, Plasma concentrations of glucose, free fatty acids, insulin, lactate, creatine kinase, f2-Isopostance, ratings of perceived exertion, respiratory exchange ratio, and skin and core temperatures.

In this research, a randomised single–blind, placebo–controlled cross–over trial was applied. The study was designed to investigate the effects of iso–caloric sago and soy supplementations through a cycling performance. The protocol was similar to an actual race in which each cyclist consumed a type supplementation in one of the experimental trials with a one week washout period between the crossover phases. There were four experimental trials in this design where the participants were randomly assigned to consume either Sago, Soy, Sago+Soy, or Placebo before and during the experimental trials. Random number tables have been used for each supplement to assign the treatments among the participants.

In the current study, all of the cyclists were blinded, and they were not informed about the type of supplementation as their taste was similar. In addition, the laboratory technicians were also not informed about the type of supplementation. The only person who was aware of the type of supplements was the Ph.D. candidate acting as the investigator.

The data of the current study belongs to the Universiti Sains Malaysia, and these data were collected for the Ministry of Science, Technology and Innovation Malaysia.

By permission.

Only available for people working in academic institutions.

Additionally, for any athletic purposes.

Sports Science Unit, School of Medical Sciences, Universiti Sains Malaysia (USM).

Approximately, one month after a request the data will be discussed to either send or not. Then, 1 or 2 additional months will be available for the person who has requested.