さらにいえば、運動することによって得られる利点には、当然ながら限りがある。食べ過ぎてしまった分を、運動を増やして清算しようというのは無理な話だ。偏った食事のツケから逃れることはできない。
また、運動量を増やすのが、いつもいいこととはかぎらない。運動は体にとってストレスのかかるものだ。少しの運動は体にいいが、やり過ぎるのは体によくない(※17)。
ダイエットの成績が「F(不合格)」な理由は?
肥満を減らしたいなら、肥満になってしまう原因に焦点をあてなければならない。もし、私たちの資金と調査と時間とやる気を運動に注いでしまったら、実際に肥満と戦うための資源は残っていないだろう。
「肥満に関する101の問題」と題した最終テストに、いま私たちは挑んでいる。95%の食事に関する問題と5%の運動に関する問題の出来によって、成績がつけられる。それなのに、私たちは勉強時間とやる気の50%を、運動に関する問題の勉強に費やしている。
私たちのいまの成績が"F(不合格)"なのも無理はない――"F"は"Fat(太っている)"の"F"だ。
※1 British Heart Foundation.
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