New to exercise help!

[Holysnap]

Hello all. I'm a 22 yr old college senior and i weight 265lb sitting at 6'3. About a year ago i was at 290lb but i switch from on-campus fried food to off-campus food where i choose what to eat and lost 30lbs just from that... I am keeping on a health diet Around 1500-2000 calories a day. and recently i've started to use my gym at school and i run/speed walk 4miles on mon wed and fridays and then bike normally 20miles on tues and thursday nights at home while i watch something on hulu.. I feel great during and after the workouts. ive noticed an excess in energy in my day-day life which is really good. I'm losing weight which is good but as u can see all my workout is cardio. i am a "big boy" but i don't have alot of strength in my arms... I'd like to do push ups but i can only do a few{2-4} before i feel like i'ma die. is there a simple exercise for arm strength to do at home without equipment that is meant for people new to str training?
another question is when i bike at school it tells me i burn about 600 calories over 50mina dn 20miles and on the internet it says i burn 1300 calories over 50mins 20miles... where is the most accurate calorie counter for exercise?
thanks for all your help!

[gymdandee]

http://www.my-calorie-counter.com/calorie_counter.asp

[Holysnap]

Yea i watched the youtube videos of Peak 8 on monday i think and i did it monday and going to do it friday. I'm kinda of on a good schedule that is still producing results for me so i'm mainly going to stick with that. As of right now mondays - Peak8 3mi run 1mi walk 10mi bike
Tues- 2mi run 2mi walk 6-10bike
Wed i have alot of classes and i get home late so i just bike 10-20mi
Tues 3mi run 1mi walk 10-15mi bike
Friday- Peak 8 4mile run 10mi bike
But i'd still like help on the calorie counter? refer to my post above

[gymdandee]

This is the fastest way to lose fat and build muscle in the body. Peak 8 actually stimulates the growth hormone in the body. I encourage you to visit Dr Mercola’s site to learn more about Peak 8 fitness because I personally feel that it is one of the best ways to exercise, especially considering the speed at which you can lose fat and build muscle.

I highly recommend you read this article and watch the videos on the page. It will give you all the information you need to know about Peak 8 – Flood Your Body With This “Youth Hormone” In Just 20 Minutes

What you eat after Peak 8 training does matter

It’s recommended that you do not eat sugar or carbohydrate for 2 hours after the Peak 8 exercise because these foods can impact the release of the growth hormone in the body.  The link is below
http://fitness.mercola.com/sites/fitness/archive/2010/11/13/phil-campbell-on-peak-8-exercises.aspx

Figure your heart rate by this formula
The Karvonen Formula is a mathematical formula that helps you determine your target heart rate zone. The formula involves using your maximum heart rate (MHR) minus your age to come up with a target heart rate range (which is a percentage of your MHR). Staying within this range will help you work most effectively during your cardio workouts.

an example of the Karvonen formula for a 23 year old person with a resting heart rate of 65 beats per minute (*to get your resting heart rate, take your pulse for one full minute when you first wake up in the morning or after you've resting for a while). This formula also includes an updated calculation of maximum heart rate (the previous formula was 220 - age, which has now been shown to be inaccurate):

206.9 - (0.67 x 23 (age)) = 191
191 - 65 (resting heart rate) = 126
126 * 65% (low end of heart rate zone) OR 85% (high end) = 82 OR 107
82 + 65 (resting heart rate) = 147
107 + 65 (rhr) = 172
The target heart rate zone for this person would be 147 to 172

First thing in the morning before you get out of bed have a clock with a second hand and check your resting heart rate then figure your rate by the
Karvonen Formula above.
.
You burn 30 percent more fat from doing cardio after a weights session as opposed to cardio on its own.
.

[Holysnap]

Wow i don't know why i never thought to do pushups with my knees on the ground... kinda like a DUH moment... but i could still use help with an exercise calorie counter. When i'm tracking how many calories i've burned in my cardio i never know if i should use my bike and treadmill numbers or if i should use a websites numbers... their drastically different sometimes my bike says i do 200 calories and a website says i do 800... is there a recommended link someone can post to me for an accurate calorie counter?

[gymdandee]

Check my post to exercise above! As for your arms when you do pushups
if you have to do them with your knees on the floor and if you can only do 4 tthen just do 4 in time you will be able to do 5+ If you google strength training without weights you will see some exercise's to do.