Articles

Articles about ESPL features and the ideas and technology behind them.

• 
  October 24, 2026 About ESPL 5 min

  vo2max.jp is live. ESPL is adding HIIT, with VO2max as the goal

  We have launched vo2max.jp, a Japanese-language site for understanding, measuring and improving VO2max (maximal oxygen uptake). ESPL also plans to add high-intensity interval training (HIIT). Research shows HIIT raises VO2max, but it is hard to keep up. We want to make it sustainable with ESPL's support-money mechanism, and help users raise their VO2max.

• 
  May 13, 2026 Behavior Change 6 min

  Using loss aversion to support a walking habit

  People tend to weigh a loss more heavily than an equivalent gain. This article looks at how ESPL applies that tendency through its support-stake and commitment design.