Second Heart - Tanaka Cadence & Focus Timer

5-minute desk break & circulation cadence metronome for desk workers and healthy longevity.

5-minute desk break & circulation cadence metronome for desk workers and healthy longevity. Second Heart is a focused interval timer and circulation cadence guide designed specifically for active desk workers, engineers, and professionals. Rooted in the exercise physiology research of Professor Hiroaki Tanaka, rhythmic movement at approximately 145 beats per minute (BPM) activates the calf and soleus muscles—often called the body's "second heart." When contracted rhythmically, these deep muscles act as a natural peripheral pump, compressing deep intramuscular veins to drive pooled blood back toward the heart and brain without causing joint stress or heavy fatigue. HOW IT WORKS: • Structured Focus Intervals: Keep yourself locked into deep work blocks. • 5-Minute Circulation Breaks: When your break triggers, stand up at your desk and pace or perform light heel bounces/slow jogs in place in sync with the 145 BPM cadence guide. • Visual & Audio Cadence: Built-in rhythmic reference ensures you hit the exact pace to activate circulation without breaking your concentration. • Zero Distractions: Clean, dark-mode user interface designed to sit quietly in your browser until break time. PRIVACY & PERFORMANCE FIRST: • 100% offline functionality. • No account, login, or tracking required. • No remote analytics or external data harvesting.