Military tests High-Fat bars for Cold-Weather performance

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: • Men and women aged 18 - 39 years (17 if active Military) * Physically active (exercise minimum 2 days per week) * Have supervisor approval (permanent party military and civilians at NSSC) * Willing to refrain from alcohol, nicotine products and dietary supplement use while on study diets * Females must have normal menstrual cycles between 26-32 days in duration; 5 menstrual cycles within the past 6 months; or using oral/hormonal contraceptive which contains low-dose estrogen/progesterone to maintain continuous levels throughout the 28-day cycle (i.e., no placebos) * Only consume caffeine products while on study diets if provided by study staff * Body mass index (BMI) between 18.5-30 kg/m2 * In good health as determined by OMSO (Office of Medical Support and Oversight) Exclusion Criteria: * Metabolic or cardiovascular abnormalities, gastrointestinal disorders (i.e., kidney disease, diabetes, cardiovascular disease, hypertension etc.) that is unsuitable for the study determined by OMSO * Disease or medication (i.e., diabetes medications, statins, corticosteroids, etc) that affects macronutrient utilization and/or the ability to participate in strenuous exercise * Allergies or intolerance to foods (including but not limited to lactose intolerance/milk allergy), vegetarian practices * Present condition of alcoholism, anabolic steroids (testosterone, enanthate, undecanoate, etc), or other substance abuse issues * Unwilling to stop use of nutritional/sports supplements (creatine, multivitamins, whey etc.) while enrolled in the study * Sensitivity to medical adhesives resulting in significant skin irritation * Acute or chronic musculoskeletal injury that compromises the ability to run and ruck march * History of disease of the gastrointestinal tract including (but not limited to) diverticulosis, diverticulitis and inflammatory bowel disease, peptic ulcer disease, Crohn's disease, ulcerative colitis; or previous gastrointestinal surgery * Difficulty swallowing large pills or unwilling to insert rectal temperature sensor * Raynaud's syndrome. * History of cold injuries of any severity (e.g., frostbite, trench foot, chilblains) that puts the volunteers at increased risk for an adverse effect * Cold-induced bronchospasms/asthma * Blood donation within 8 weeks of the study * Unwillingness or inability to adhere to study exercise restrictions * Scheduled MRI within 2 weeks after completing test in cold