Suuntoさんのインスタグラム写真 - (SuuntoInstagram)「Heart rate data is not only for athletic training. Out in the mountains you can use it to pace your efforts so you will have a safe and successful tour. Another key metric for pacing your uphills is your vertical speed. Can I sustain this level of effort the entire route? 🏂 @anttiautti 📷 @postinjaakko #arcticlines #adventurestartshere」2月4日 4時05分