減肥還是戶外好! 跑步機上需加速15%大綱

Runners need to move 15 per cent faster on a treadmill to burn the same number of calories as jogging outdoors, research reveals.

一項研究表明，跑步者在跑步機上的速度要比戶外慢跑快15%，才能與其燃燒同等熱量。

Researchers from Milan University analysed the difference between running outdoors or on a treadmill in 15 physically fit males with an average age of 21.

意大利米蘭大學的研究人員分析了平均年齡爲21歲的15名健康男子去戶外跑步與在跑步機上跑步的差異。

The participants sprinted for 30 seconds followed by 30 seconds of recovery for a total of 15 minutes both outdoors and on a treadmill.

參與者先快跑30秒，然後休息30秒，這樣分別在戶外和跑步機上運動15分鐘。

Oxygen use and exercise intensity were measured after both types of running. The findings were published in the journal of Applied Physiology, Nutrition and Metabolism.

研究人員會在兩種類型的跑步後，測量參與者的耗氧量和運動強度。研究成果發表在加拿大《應用生理學、營養與代謝》雜誌上。

Results revealed that when on a treadmill, runners use significantly lower amounts of oxygen, suggesting less effort is required.

結果顯示，在跑步機上跑步時，跑步者的耗氧量大大降低，表明這種方式更省勁。

The study authors wrote: 'A 15 per cent increase in running velocity during a high intermittent intensity treadmill training session is the optimal solution to reach the same physiological responses as an outdoor training session.'

該研究的作者寫道：“在高間歇強度跑步機訓練期間，跑步速度增加15%，是達到與戶外鍛鍊同樣生理反應的最佳解決方案。”

Although the study did not speculate why treadmill running appears to be less strenuous, previous research suggests the moving belt of a treadmill propels joggers forward, causing them to move faster.

儘管這項研究沒有推測爲何在跑步機上跑步似乎更省力，但以往的研究指出，跑步機上移動的跑帶會推動跑步者向前，從而讓他們跑得更快。

Exercising indoors also means gym-goers do not have to contend with steep hills or wind resistance.

此外，室內鍛鍊還意味着鍛鍊者不必應付陡峭的山坡或風的阻力。