Nutritional advice is sound.
The reason people don't do cardio on resistance days is because one is an anabolic process and one is catabolic. Steady state cardio also focuses on activation of Type I (endurance based) as opposed to the fast-twitch power delivery fibers that are type II.
However OP is in phase I conditioning, cardio and resistance on the same day is absolutely fine, for the first 6 to 8 weeks.
Strength gains will come from increased musclular fiber recruitment (motor-neurons get better at firing) and from an increase in fiber size through hypertrophy. The OP will see considerable gains in the first 8 weeks, in size, strength, mass and body fat reduction, as an unconditioned individual adapation time is prolonged.
Interesting reading Ant, thanks.
I would tend to be one of the unfortunates then as the initial large gains only lasted around 4 -5 weeks for me

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Muscle and liver glycogen is depleted and replenished on a regular basis. Utilisation of stored glycogen isn't superior in newbies, it's far less effecient, that's why first sessions are comparibly poor, and return sessions are really bloody tough.
Glycogen replenishment occurs the next time food is consumed, as long as there is sufficient quantity and quality. Injury is likely to occur because of poor motor-firing patterns and motor-neuron recruitment as opposed to depletion of blood glycogen, which is likely to cause lethargy and lack of concentration.
Sure but not the point I was trying to make.
If I do a heavy weight workout and then go to do an hour of bag work then I am more likely to fatigue quicker and with the fatigue, for me at least, come a loss of concentration and I am more likely to get sloppy with the punches. This has a knock-on effect of an increased risk of injury due to sloppy technique (incorrect impact position, not locking wrists etc).
I also find that a first session is usually very good and beats my expectations. Endurance is usually good and ability is reasonable. Come the second session I find that endurance is pretty poor compared to the original session and strength may be lacking.
I tend to put this down to the fact that I am on a calorie restricted low carb diet. As such, coming to the first session after a big break results in the muscles glycogen stores being full and ready to go. Hitting a second session whilst on a diet may result in the body not being able to fully refill the glycogen stores. Adding to this, as you mentioned, is the fact that a new starter will most likely need to use more energy in order to perform the same actions as their muscles may not be very efficient. I fully appreciate there may be numerous other factors including intensity of exercise and the persons ability to reduce their stores and am fully open to any other considerations. Such a large subject, there is always more to learn

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There's nothing wrong with two days activity on the trot, especially under supervision.
Ant
I would say that depends on the quality of the supervision. To be helped by someone who is building or maintaining and who has been for a while may not be as helpful as being supervised by a qualified professional even if they are a PT

, yourself excluded (from the 'even if') of course Ant

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A lot of people are happy to give good advice but some people have gone well beyond the initial stages and it is hard to remember what they were like or what the best requirements are.
Ant kills another thread. Please continue chaps, just pretend I didn't say anything
So I am not the only one who gets that feeling then

. I tend to find it is more in GD for me though.
Cheers
RB