Overview
Our goal is to determine whether hydration status influences inflammation, and overall physiological performance in adults aged 45-65.
Aim 1: The effects of 4-day mild dehydration followed by 4-day rehydration (defined as approximately 2-3% body mass loss) on H2O2, upstream inflammatory signal (NFkB), mitochondrial fragmentation, and autophagy in circulating PBMCs.
Aim 2: The effects of 4-day mild dehydration followed by 4-day rehydration (defined as approximately 2-3% body mass loss) on fasting glucose, sleep performance, and strength performance.
Participant will:
complete a 4-day hydration protocol, followed by a 4-day dehydration protocol, and then a 4-day rehydration protocol.
attend five laboratory visits for testing: Day 1: Informed consent and familiarization Day 2: Pre-hydration testing (before the 4-day hydration protocol) Day 3: Pre-dehydration testing (before the dehyration protocol) Day 4: Post-dehydration testing (after the dehydration protocol) Day 5: Post-rehydration testing (after the rehydration protocol)
Eligibility
Inclusion Criteria:
- Apparently Healthy
- BMI < 30 kg/m2
- Body weight is at least 110 lbs
Exclusion Criteria:
- Currently pregnant
- Have Type 1 Diabetes or Type 2 Diabetes
- Have chronic kidney disease or a history of kidney stones
- Have hypertension
- Take medications that can cause fluid retention, such as corticosteroids, chronic use of Nonsteroidal Anti-inflammatory Drugs (NSAIDs), Hormonal Therapies (e.g., estrogen, androgens or anabolic steroids), Antihypertensives, Psychiatric Medications (e.g., Lithium), Vasodilators
- Take medications that reduce fluid retention: diuretics, and RAAS Inhibitors (e.g., ACE inhibitors and ARBs)