Nutrition, Weight Management, and Lifestyle Behavior Change
Scope first
A strength and conditioning or special population specialist provides general nutrition education and refers medical nutrition therapy to a registered dietitian. Know the general content anyway: energy balance, macronutrient roles, protein needs of about 1.2 to 1.6 g/kg for older adults and during weight loss, fiber of 25 to 38 g per day, sodium under 2300 mg, added sugar under 10 percent of calories, saturated fat under 10 percent, and hydration.
Weight management
A 5 to 10 percent loss improves cardiometabolic markers. A rate of 0.5 to 1 kg per week with a deficit of roughly 500 to 750 kcal per day is standard, paired with 150 to 300 minutes per week of moderate activity and two resistance sessions to preserve lean mass. Maintenance after loss often needs 250 to 300 minutes per week.
Behavior change
Name the transtheoretical stages, self-efficacy, decisional balance, and motivational interviewing skills: open questions, affirmations, reflections, summaries. Know SMART goal setting, self-monitoring, stimulus control, social support, and relapse prevention. Match the strategy to readiness rather than delivering a plan to a client in precontemplation.
Traps
Prescribing calorie targets, therapeutic diets, or supplements, which exceeds scope. Substituting sodium advice for referral when chronic kidney disease is present. Assuming every client wants weight loss. Missing disordered eating red flags such as rapid loss, secrecy, or compulsive exercise. Pushing high protein without medical input in kidney disease.
Rule of thumb
The 1 percent rule: losing faster than about 1 percent of body mass per week raises the risk of lean mass loss. Aim for 0.5 to 1 percent per week with resistance training and adequate protein.
Worked example
A 90 kg sedentary adult: a 5 to 10 percent target is 4.5 to 9 kg over six months, about 0.5 to 0.75 kg per week, a roughly 500 kcal daily deficit, 200 minutes per week of moderate activity plus two resistance sessions, and weekly self-weighing.