The purpose of this study is to determine change in injury risk and performance variables in males and females after walking unloaded and carrying a load with two different distributions (high-pack placement and mid-pack placement) to identify differences in injury risk

Inclusion Criteria:

• Healthy, physically active individuals
• 18-39 years old

Exclusion Criteria:

• History of musculoskeletal injury within the last six months or still under a physicians care for an injury occurring more than six month prior
• History of spinal disc injury
• History of cardiovascular, metabolic, respiratory, neural, or renal disease
• No previous history or education of completing resistance exercise
• Hypertensive or tachycardic during the screening visit (SBP > 139 mmHg, DBP > 89 mmHg, heart rate > 100 bpm)
• Taking medication or supplements with a known side effect of affecting physiologic responses to exercise (e.g., beta blockers, omega-3 fatty acids, statins, aspirin)
• Any form of tobacco or nicotine use
• A positive pregnancy test at any point in the study
• Study physician discretion based on any other medical condition or medication
• Gastrointestinal disease or previous surgery prohibiting internal body temperature pill use. Subjects who have any contraindication to internal body temperature pill ingestion will be given the option to insert the pill rectally (as a suppository) or use a rectal probe.

We do not plan to share IPD with other researchers.