We invite you to take part in a research study if you are:

• Female sex between 18-40 years old
• Premenopausal with a regular menstrual cycle between 25-35 days and have tracked your menstrual cycle consistently for at least the past three months.
• Willing to wear a Garmin activity tracker device daily including during sleep
• Own a smartphone with the ability to track and sync data via a mobile app
• Not be pregnant, less than 12 months postpartum, or breastfeeding

Additional criteria will be evaluated using an online screener

We invite you to take part in a research study because you are a male runner between the ages of 18 and 40 who has been running at least 4 times per week for the past 3 years and has a recent 5 km personal best under 20 minutes. You must also be:

• Free from injury and able to safely complete treadmill running
• Willing to follow all pre visit restrictions (no caffeine within 24 hours, no strenuous exercise within 24 hours, no food within 3 hours)

• Younger adults aged 18–35 years with a body mass index (BMI) of 18.5–34.9 kg/m² who have participated in lower-body resistance training at least twice per week for the previous 6 months.
• Older adults aged 70 years and older with a body mass index (BMI) of 18.5–34.9 kg/m² who have not participated in lower-body resistance training during the previous 6 months.

• Are a recreationally active (≥150 minutes per week of physical activity) male between the ages of 18-35.
• Are willing to come in for all five visits.

• Adults 18-40 years of age
• Familiarity with the names of foundational yoga poses
• Physical activity is not contraindicated (i.e., no affirmative responses on the Physical Activity Readiness Questionnaire for Everyone [PAR-Q+])

• Ages: 18-75
• Chronic low back pain (lasting 3+ months)
• Pain intensity: 3/10 or higher in the past 24 hours
• Access to email and the internet

• Enrolled UCF student
• Female, aged 18 to 30
• Willing to wear an activity tracker on your wrist for 7 days
• Able to read, write, and provide informed consent in English

• Participants must be untrained (do not meet ACSM criteria for being physically active: strength training less than 2x/week and less than 150 minutes of aerobic exercise per week)
  • Please note: We are no longer recruiting resistance-trained individuals. We have already completed recruitment of this group.
• 18-50 years old
• Healthy (no pain or injury)

• Male or female adult (18-40 years old)
• Complete less than 150 minutes per week of aerobic exercise and less than 2 full-body resistance training sessions per week
• Free from implanted pacemakers/defibrillators
• Free from open cuts/wounds on your right hand and foot
• Metabolically healthy (we will determine this using a health history questionnaire and a resting blood pressure < 140/90 mmHg)
• Not actively attempting to gain/lose weight

• 18+ years of age
• Free from implanted pacemakers/defibrillators
• Free from open cuts/wounds on the right hand/foot