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Papers by Sarah Fretti
British Journal of Nutrition, 2013
The purpose of the present study was to investigate whether whey protein (WP), casein protein (CP... more The purpose of the present study was to investigate whether whey protein (WP), casein protein (CP), carbohydrate (CHO) or a non-energy-containing placebo (PLA) consumed before sleep alters morning appetite and resting energy expenditure (REE) in active men. A total of eleven men (age: 23·6 (sem 1·0) years; body fat: 16·3 (sem 2·5) %) participated in this randomised, double-blind, cross-over study. A single dose of WP (30 g), CP (30 g), CHO (33 g) or PLA was consumed 30 min before sleep, and each trial was separated by 48–72 h. The next morning (05.00–08.00 hours), measurements of satiety, hunger and desire to eat and REE were taken. After a 30 min equilibration period, REE in the supine position was measured for 60 min. An analysis of 10 min mean intervals over the final 50 min of the measurement period was conducted. Statistical analyses were conducted using repeated-measures ANOVA for metabolic variables, and a one-way ANOVA was used for measuring changes in appetite markers. Grou...
mHealth, 2021
Wearable technology is an exciting and inexpensive method for monitoring training intensities and... more Wearable technology is an exciting and inexpensive method for monitoring training intensities and providing data for performance testing. In the case of the FitBit Charge 2 (FBC2) device, the parameters of speed, distance, and heart rate (HR) can be monitored and downloaded by the user. In the present Editorial Commentary, we discuss a recent study by Freeberg et al. (1). These investigators examined the validity of the FBC2 device and the manufacturer’s protocol for estimating maximum oxygen uptake (V̇ O2max). Our commentary focuses on the technique that the FBC2 uses to predict maximum oxygen uptake (V̇ O2max). Rather than rely on exercising HR along with distance and time, we recommend wearable manufacturers consider a method of predicting V̇ O2max based off of an estimate of critical speed (CS). The utilization of a time-trial (i.e., fastest time elapsed for a fixed distance) will be influenced by both aerobic and anaerobic energy systems. As our commentary summarizes, there is ...
British Journal of Nutrition, 2013
The purpose of the present study was to investigate whether whey protein (WP), casein protein (CP... more The purpose of the present study was to investigate whether whey protein (WP), casein protein (CP), carbohydrate (CHO) or a non-energy-containing placebo (PLA) consumed before sleep alters morning appetite and resting energy expenditure (REE) in active men. A total of eleven men (age: 23·6 (sem 1·0) years; body fat: 16·3 (sem 2·5) %) participated in this randomised, double-blind, cross-over study. A single dose of WP (30 g), CP (30 g), CHO (33 g) or PLA was consumed 30 min before sleep, and each trial was separated by 48–72 h. The next morning (05.00–08.00 hours), measurements of satiety, hunger and desire to eat and REE were taken. After a 30 min equilibration period, REE in the supine position was measured for 60 min. An analysis of 10 min mean intervals over the final 50 min of the measurement period was conducted. Statistical analyses were conducted using repeated-measures ANOVA for metabolic variables, and a one-way ANOVA was used for measuring changes in appetite markers. Grou...
mHealth, 2021
Wearable technology is an exciting and inexpensive method for monitoring training intensities and... more Wearable technology is an exciting and inexpensive method for monitoring training intensities and providing data for performance testing. In the case of the FitBit Charge 2 (FBC2) device, the parameters of speed, distance, and heart rate (HR) can be monitored and downloaded by the user. In the present Editorial Commentary, we discuss a recent study by Freeberg et al. (1). These investigators examined the validity of the FBC2 device and the manufacturer’s protocol for estimating maximum oxygen uptake (V̇ O2max). Our commentary focuses on the technique that the FBC2 uses to predict maximum oxygen uptake (V̇ O2max). Rather than rely on exercising HR along with distance and time, we recommend wearable manufacturers consider a method of predicting V̇ O2max based off of an estimate of critical speed (CS). The utilization of a time-trial (i.e., fastest time elapsed for a fixed distance) will be influenced by both aerobic and anaerobic energy systems. As our commentary summarizes, there is ...