Generally, exercise will lower blood sugar and it’s best to prepare for exercise by eating before you start out. If your blood-sugar level is above 250 mg/dl, however, exercise could make it rise even higher.
You can get fit in 10 minutes a week
This and similar claims are common, but untrue. There are no shortcuts to getting fit. Becoming fit takes work and the general rule is 20 minutes of aerobic activity three times a week. Consistency is the key. If you miss a day or two, don’t try to compensate by doing double duty—you open yourself up to injury.
No pain, no gain
Many people tend to overdo their exercise programs looking for quick results. Doing so, however, may prove to be your downfall by resulting in injury or sore muscles.
Your best bet is to start any exercise program slowly and gradually increase the workout.
We start people out with 15 minutes of stretching, 30 to 40 minutes of walking or walking/jogging, and end with 10 more minutes of stretching. This gives people a good beginning without the pain or injury.
Electric stimulation
Electric stimulation may help make a muscle contract and tone it slightly, but this technique can’t take the place of exercise, and it certainly won’t help you lose weight.
健身是當今的熱門話題。無論你走到哪裏,都能聽到許多新奇的事情。但是,那些都是正確的嗎?
流汗越多,消耗的脂肪越多
這個錯誤的觀點鼓勵人們在極熱的環境下運動,或者穿好幾層衣服或者穿橡膠或塑料減肥服,希望通過流汗將脂肪排出。然而,他們排出去的是水而非脂肪。
作為一種燃料能源,脂肪隻有運動才能消耗。但在剛開始運動時是不能奏效的。當你開始運動時,你消耗的是碳水化合物,或是糖分。平緩進行有氧運動大約20分鍾後,才會使你由消耗糖分向消耗脂肪過度。(有氧運動就是有節奏的、持續的活動。它需要耗氧並且鍛煉像手臂和腿部的大塊肌肉。例如騎自行車、跳繩、步行、慢跑、跳舞和遊泳)。所以說,要消耗脂肪,至少要運動40分鍾。
停止運動,肌肉變脂肪
如果你的運動量減少,但食物的攝入量不變或有所增加,那過去努力鍛煉減去的脂肪很可能會卷土重來。然而,這並不是因為你的肌肉變成了脂肪。肌肉可能萎縮或失去彈性,但是它們是不會變成脂肪的。肌肉是肌肉,脂肪是脂肪。
鍛煉增加食欲
對於持續進行了1個小時或更長時間劇烈運動的人來說確實如此。然而,不到1個小時的平緩運動很可能在1~2個小時內降低你的食欲。
鍛煉可以降低血糖
在通常情況下,鍛煉能降低血糖,在開始鍛煉前你最好先吃點東西。然而,如果你的血糖量高於250毫克/分升,鍛煉會使你的血糖量升得更高。
每周10分鍾,還你健康
這種說法和類似的觀點很普遍,但不正確。健康之路無捷徑。要想變得健康就必須鍛煉。一般是每周進行3次,每次20分鍾的有氧運動。關鍵是要堅持。如果你中間耽誤了一兩天,不要通過加倍的運動來彌補——這樣做你會受到傷害的。