An Investigation Of Dietary Patterns And Macronutrient Intakes Among Resistance-trained Men

Abstract

PURPOSE: This study aimed to assess the adequacy of dietary patterns and macronutrient intakes in support of the adaptations to resistance training within a weekly microcycle of resistance-trained (RT) men using traditional dietary assessment methods. METHODS: Thirty-seven RT men (age (y) Mdn (IQR) 24.9 (20.7-29.7), body mass (kg) M (SD) 81.3 (11.8)) were recruited to participate in this study. Dietary data were collected by self-reported 7-day weighed intake record and analysed on both a daily and per eating occasion (EO) basis using nutrition software. Adequacy was assessed against recommendations for this population (ACSM, 2016; IOC, 2018). Data are reported as M (SD), Mdn (25-75 percentile) and p-value (p). RESULTS: Average daily energy intake for training day (TD) and rest day (RD) was 36 (7) and 34 (8) kcal·kg-1·d-1, respectively. Daily protein (PRO) intake (g·kg-1·d-1) was significantly greater than recommended minimum (1.6 g·kg-1·d-1) on TD [2.1 (0.5), P < .001) but was not different on RD [1.8 (0.6), P = .058]. Carbohydrate (CHO) intake (g·kg-1·d-1) was significantly lower than 5 g·kg-1·d-1 on both TD [3.5 (1.1), P < .001], and RD [3.3 (1.0), P < .001)]. Daily frequency of EO was significantly higher than the recommended 3-4 EO (P < .001) for TD [5 (5-6)] and RD [5 (4-5)]. When analysed per EO (g·kg-1·EO-1), average PRO intake was significantly greater per main meal (MM) on TD [0.5 (0.4-0.6), P < .001] and RD [0.5 (0.4-0.6), P < .001], but not significantly different per snack (SN) [0.2 (0.1-0.3)] for TD (P = .254) and RD (P = .111) vs recommended 0.25 g·kg1·EO-1. CHO intake (g·kg-1·EO-1) per MM was 0.9 (0.7-1.1) for TD and 1.0 (0.7-1.1) for RD. CHO (g·kg-1·EO-1) consumed per SN was 0.4 (0.3-0.5) for both TD and RD. Daily number of MM was 3 (3-3) for TD and RD, and of SN were 3 (2-4) for TD, 2 (1-3) for RD. CONCLUSION: RT men met dietary recommendations to optimise adaptation to resistance training. However, the traditional dietary assessment methods do not address the importance of quantity, quality (source), timing, distribution and frequency of nutrients relative to a specific training session, termed peri-training nutrition (PTN), to optimise training adaptation. Future work must work towards analysis methods in support of periodised, personalised nutrition, relative to a specific training stimulus. FHI Grant TC20130001.