Effect Of Dietary Protein Intake On Nitrogen Balance During Resistance Exercise Training

2010 ◽  
Vol 42 ◽  
pp. 64
Author(s):  
Maurie J. Luetkemeier ◽  
Michael J. Bradburn
Keyword(s):  
Exercise Training ◽  
Resistance Exercise ◽  
Nitrogen Balance ◽  
Dietary Protein ◽  
Protein Intake ◽  
Dietary Protein Intake ◽  
Resistance Exercise Training

scholarly journals Acute Dietary Protein Intake Restriction Is Associated with Changes in Myostatin Expression after a Single Bout of Resistance Exercise in Healthy Young Men

2013 ◽  
Vol 144 (2) ◽  
pp. 137-145 ◽  
Author(s):  
Tim Snijders ◽  
Lex B. Verdijk ◽  
Bryon R. McKay ◽  
Joey S.J. Smeets ◽  
Janneau van Kranenburg ◽  
...  
Keyword(s):  
Resistance Exercise ◽  
Dietary Protein ◽  
Protein Intake ◽  
Young Men ◽  
Dietary Protein Intake ◽  
Single Bout

scholarly journals Increased Leg Strength After Concurrent Aerobic and Resistance Exercise Training in Older Adults Is Augmented by a Whole Food-Based High Protein Diet Intervention

2021 ◽  
Vol 3 ◽  
Author(s):  
James F. Timmons ◽  
Michelle Hone ◽  
Karl E. Cogan ◽  
Orlaith Duffy ◽  
Brendan Egan
Keyword(s):  
Older Adults ◽  
Exercise Training ◽  
Resistance Exercise ◽  
Physical Function ◽  
Interaction Effect ◽  
Protein Intake ◽  
Dietary Intervention ◽  
High Protein ◽  
Resistance Exercise Training ◽  
Whole Foods

Most studies in older adults have utilized powdered protein supplements or oral nutrition solutions as a source of additional dietary protein, but whole foods may provide a greater anabolic stimulus than protein isolated from food matrices. Therefore, the present study investigated a concurrent aerobic and resistance exercise training program in older adults, in the absence or presence of a high protein whole food-based dietary intervention, for effects on strength, physical function, and body composition. Community-dwelling older adults (n = 56; M/F, 28/28; age, 69.3 ± 4.0 years; BMI, 26.6 ± 3.7 kg m−2) participated in a 12-week intervention after randomization to either nutrition only (NUTR; n = 16), exercise only (EX, n = 19), or nutrition plus exercise (NUTR + EX, n = 21) groups. NUTR and NUTR + EX followed a dietary intervention targeting an increase in protein-rich meals at breakfast, lunch, and dinner. Exercise training in EX and NUTR + EX consisted of 24 min sessions of concurrent aerobic and resistance exercise performed three times per week. Daily protein intake increased in NUTR and NUTR + EX, but not EX. The increase in 1RM leg press strength was greater (Interaction effect, P = 0.012) in NUTR + EX [29.6 (18.1, 41.0) kg] than increases observed in NUTR [11.1 (−1.3, 23.6) kg] and EX [12.3 (0.9, 23.8) kg]. The increase in 1RM chest press strength was greater (interaction effect, P = 0.031) in NUTR + EX [6.3 (4.0, 8.6) kg] than the increase observed in NUTR [2.9 (0.3, 5.5) kg], but not EX [6.3 (3.9, 8.7) kg]. Hand-grip strength and sit-to-stand performance were each improved in all three groups, with no differences observed between groups (interaction effect, P = 0.382 and P = 0.671, respectively). An increase in percentage body fat was observed in NUTR, but not in EX or NUTR + EX (interaction effect, P = 0.018). No between-group differences were observed for change in lean body mass (interaction effect, P = 0.402). Concurrent aerobic and resistance exercise training improves strength and physical function in older adults, but combining this training with an increase in daily protein intake through whole foods may be advantageous to increase lower limb strength.

scholarly journals Process Evaluation of a Combined Lifestyle Intervention for Community-Dwelling Older Adults: ProMuscle in Practice

2020 ◽  
Vol 60 (8) ◽  
pp. 1538-1554
Author(s):  
Ellen J I van Dongen ◽  
Esmée L Doets ◽  
Lisette C P G M de Groot ◽  
Berber G Dorhout ◽  
Annemien Haveman-Nies
Keyword(s):  
Older Adults ◽  
Exercise Training ◽  
Resistance Exercise ◽  
Dietary Protein ◽  
Community Dwelling ◽  
Successful Implementation ◽  
Resistance Exercise Training ◽  
Support Intervention ◽  
Nutrition Course ◽  
Community Dwelling Older Adults

Abstract Background and Objectives The ProMuscle in Practice intervention combines resistance exercise training and dietary protein intake for community-dwelling older adults, implemented by health care professionals (HCPs). This study aimed to evaluate implementation and context of this intervention in Dutch health care practice. Research Design and Methods We conducted a randomized controlled multicenter intervention study in 5 Dutch municipalities. Eighty-two older adults received the 12-week intensive support intervention (resistance exercise training and individual dietary counseling) and the optional 12-week moderate support intervention (resistance exercise training and a nutrition course). Mixed method data were collected from both participants and HCPs (n = 37) on process indicators recruitment, dose received, acceptability, fidelity, applicability, and context. Results Overall, the intervention was feasible to implement and accepted by participants and HCPs. About two thirds of participants continued with the moderate support intervention after the first 12 weeks. The mean dose received for the training sessions was 83.6% in the intensive intervention, 63.6% in the moderate intervention, >90% for individual dietitian consultations, and 76.8% for the nutrition course. The intensive support intervention was implemented with high fidelity, whereas for the moderate support intervention resistance exercise trainings varied in implementation between exercise providers. Discussion and Implications A combined resistance exercise training and dietary protein intervention for community-dwelling older adults can be successfully implemented in practice. Well-tailored interventions, intensive supervision by skilled HCPs, social aspects, fidelity, and fit within real-world settings appeared essential for successful implementation. These elements are important for continuous intervention optimization to accomplish broader and successful implementation.

scholarly journals Higher Protein Intake Does Not Potentiate Skeletal Muscle Vitamin D Receptor

2021 ◽  
Vol 5 (Supplement_2) ◽  
pp. 512-512
Author(s):  
Colleen McKenna ◽  
Amadeo Salvador ◽  
Andrew Askow ◽  
Kevin J.M. Paulussen ◽  
Alexander Keeble ◽  
...  
Keyword(s):  
Gene Expression ◽  
Vitamin D ◽  
Resistance Training ◽  
Resistance Exercise ◽  
Lean Mass ◽  
Dietary Protein ◽  
Protein Intake ◽  
Dietary Protein Intake ◽  
Resistance Training Program ◽  
Middle Aged Adults

Abstract Objectives The loss of muscle mass with age increases not only risk of functional impairment, but also development and exacerbation of cardiometabolic disease. While dietary protein intake and habitual resistance exercise are traditional strategies to offset age-related decrements in lean mass, it is important to define the role of other regulatory nutrients in this process. Dietary vitamin D (VD) has received particular interest as muscle vitamin D receptor (VDR) is associated with hypertrophy. Importantly, beyond being a significant source of high-quality protein, animal-based protein foods are also rich in VD. While previous efforts have investigated the provision of protein and/or VD supplements during a resistance training program, the influence of dietary protein composition and diet-derived VD on resistance exercise adaptations remains unknown. Methods Forty-one middle-aged adults (mean ± SD: age 50 ± 8 y, BMI 27 ± 4 kg/m2, M = 19, F = 22) were stratified and randomized to consume either high (1.68 ± 0.26 g/kg/d) or moderate (1.16 ± 0.19 g/kg/d) amounts of animal-based protein during a 10-week dietary counseling-controlled resistance training program. Dietary intake was monitored by biweekly 3d diet records (ASA24). Dual-energy x-ray absorptiometry and muscle biopsies were performed pre- and post-intervention. Total RNA was extracted and reverse-transcribed for muscle gene expression by quantitative polymerase chain reaction. Intervention outcomes and their relationships were analyzed using linear mixed effects models and repeated measures correlation, respectively, by R. Results VDR gene expression increased regardless of condition (P = 0.007; 95% CI: 0.13, 0.84). Upregulation of VDR expression was correlated with gains in appendicular lean mass (r = 0.44; P = 0.011; CI: 0.10, 0.68). While protein intake did not affect VDR expression, animal-based protein diet density (servings/1000 kcal) was modestly correlated with VDR expression (r = 0.42; P = 0.014; CI: 0.08, 0.67). There was no relationship between dietary VD and VDR expression. Conclusions Our results suggests that moderate dietary protein intake is sufficient to support resistance exercise-induced VDR upregulation and lean mass gain in middle-aged adults. Funding Sources Funded in part by the Beef Checkoff. CFM funded by JBT Fellowship, UIUC.

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