Now that summer is in full swing — and The Little Mermaid has everyone craving a dip in the sea — it feels like an ideal time to move your weekly jog into the water for a refreshing pool run. Not only ...

The suffocating summer heat and humidity can make even the most dedicated outdoor runner feel unmotivated. For those who want an alternative to running on the roads without losing their fitness, deep ...

Water is heavy—one liter weighs 2.2 pounds, and four liters weighs almost nine pounds. Even the best-designed hydration packs or vests, waistbelts, or handheld carrying systems don’t make water any ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. December 2, 2025 Add ...