sir, imho, it will be dependent on your availability. in my case, i have no choice but to workout only after office hours. but on weekends, i do it on daytime.
but if you had the luxury of time, i'd say anytime is good, for as long as you've had a good rest prior to your workout
I think the "preferable" time is whatever time you feel the most energetic. For me it's early morning to late morning... Afterwhich medyo I feel tired more easily...
quote: Originally posted by: mazdamazda "i read somewhere to avoid working out at night because the plants are releasing CO2 by then.
also read not to workout 2 hours before sleeping? is that right?"
John: I think that only applies if you jog or some outdoor activity, but honestly, do we have enough trees to worry about that? Coupled with the pollution, I think CO2 emitted by nature will be the least of your worries.
The 2hr before sleep principle is valid but is not a stone-carved rule. The problem with working out that late (especially intense training) is that it'll definitely affect your sleep, which screws up your recovery.
If you work out with high intensity, your body will be depleted of glycogen, the only way to restore this is to consume high glycemic carbs, unfortunately, if you're going to sleep, these carbs will most probably be stored as fat anyway.
quote: Originally posted by: billyboy " I think it's more of what's convenient on your part.Lalo na if you're tied up with work.I guess what is important is to give yourself time to workout."
ditto!
i just make sure i allot at least an 1hr of my day for my scheduled workout.
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"you can work out hard, and you can work out long, but you can't work out hard and long."
Cant explain it in my own words but i found an answer similar to my own opinion.
(1) WHEN YOU WAKE UP in the morning after an 8-to-12 hour overnight fast, your body's stores of gylcogen are somewhat depleted. Doing cardio in that state causes your body to mobilize more fat because of the unavailability of glycogen.
(2) EATING CAUSES A RELEASE of insulin, which interferes with the mobilization of bodyfat. Less insulin is present in the morning; therefore you burn more bodyfat when you do your cardio in the morning.
(3) THERE'S LESS CARBOHYDRATE (glucose) in your bloodstream after an overnight fast. With less glucose available, you'll burn more fat.
(4) IF YOU EAT IMMEDIATELY before a workout, you have to burn off carbs you just ate before tapping into stored bodyfat.
(5) WHEN YOU DO CARDIO IN THE MORNING, your metabolism stays elevated for a period of time after the workout is over. If you do cardio in the evening, you will benefit from it, but you fail to take advantage of teh afterburn effect because your metobolic rate drops dramatically as soon as you go to sleep.
Research supports this theory. A study performed at Kansas State University and published in Medicine and Science in Sports and Exercise showed the subjects burned a kilogram (2.2 lbs.) of fat sooner when the exercised in a fasted state in the morning than when the did it later in the day. The researchers measured respitory gas exchange, caloric expenditure, and carbohydrate/fatty acid metabolism and found that the amount of fat burned during aerobic exercise amounted to 67% of the total energy expenditure in the morning after a 12 hour fast. That's substantially higher than the 50% expenditure achieved when the subjects did the same exercise later in the day or after eating.
quote: Originally posted by: jayson_expy99 "before breakfast isthe best for me. Cant explain it in my own words but i found an answer similar to my own opinion. (1) WHEN YOU WAKE UP in the morning after an 8-to-12 hour overnight fast, your body's stores of gylcogen are somewhat depleted. Doing cardio in that state causes your body to mobilize more fat because of the unavailability of glycogen. (2) EATING CAUSES A RELEASE of insulin, which interferes with the mobilization of bodyfat. Less insulin is present in the morning; therefore you burn more bodyfat when you do your cardio in the morning. (3) THERE'S LESS CARBOHYDRATE (glucose) in your bloodstream after an overnight fast. With less glucose available, you'll burn more fat. (4) IF YOU EAT IMMEDIATELY before a workout, you have to burn off carbs you just ate before tapping into stored bodyfat. (5) WHEN YOU DO CARDIO IN THE MORNING, your metabolism stays elevated for a period of time after the workout is over. If you do cardio in the evening, you will benefit from it, but you fail to take advantage of teh afterburn effect because your metobolic rate drops dramatically as soon as you go to sleep. Research supports this theory. A study performed at Kansas State University and published in Medicine and Science in Sports and Exercise showed the subjects burned a kilogram (2.2 lbs.) of fat sooner when the exercised in a fasted state in the morning than when the did it later in the day. The researchers measured respitory gas exchange, caloric expenditure, and carbohydrate/fatty acid metabolism and found that the amount of fat burned during aerobic exercise amounted to 67% of the total energy expenditure in the morning after a 12 hour fast. That's substantially higher than the 50% expenditure achieved when the subjects did the same exercise later in the day or after eating. "
There's a big disadvantage with this concept though, also proven. This works in general for weight loss driven workouts, for bodybuildings, working out hard without consuming good carbs and protein beforehand will lead to muscle catabolism. Muscles NEED glycogen to prevent muscle cannabilism.
It's also proven that if you eat prior to exercising, you still burn fat, it all depends on what food you eat. Low GI carbs will not spike insulin. If your body cannot release insulin, you're in BIG trouble (read: diabetics), your insulin levels should always be maintained to provide your body with optimal metabolism (for both fat loss and muscle building).
The key is to chose what carb to eat. Low GI carbs (slow release, whole grain/wheat products) are great pre-workout, high GI carbs (sugars, fructose, processed food, enriched flour, etc) are not.