Problem with running and jumping at the same time

I rearranged your code so I could see what is going on. My notes, questions, and comments are within the code mixed with yours. I hope this helps.[source lang="cpp"]//if accelerating and the last time that he accelerated was less than X seconds ago, he’s running and accelerating
if(timeCurrent - athlete.last_acceleration > athlete.delay_acceleration)
{
if(athlete.accelerating)
{
athlete.accelerating = false; //met the athlete.delay_acceleration requirement so cannot accelerate no longer
athlete.last_acceleration = timeCurrent;
athlete.running = true; //athlete is running even though no longer accelerating
}
else //athlete is not accelerating
{
athlete.decelerating = true; //x seconds after acceleration stopped, start decelerating
//athlete.running = true; ?
}
}//else did not meet minimum athlete.delay_acceleration so do nothing?
// else
// {
// athlete.accelerating();
// athlete.running = true;
// }

//decelerating and the last time that he decelerated was less than X seconds ago?
if(timeCurrent - athlete.last_deceleration > athlete.delay_deceleration) //is he running and decelerating? What is the purpose if this check?
{
if(athlete.decelerating)
{
if(athlete.speed >= 1) //QUESTION minimum speed?
{
//athlete starts to decelerate
athlete.last_deceleration = timeCurrent;
athlete.decelerate(); //?
}
else // athlete is not decelerating if slower than 1 : don't decelerate. Should athlete.decelerating = false?
{
athlete.running = false; //QUESTION athlete stopped running because he is not decelerating? What if started accelerating again?
//athlete.deceleration = false;
//QUESTION is athlete.speed == 1 not moving?
}
}
}//else did not meet minimum athlete.delay_deceleration so do nothing?


// If athlete is running change position otherwise don't? What about jumping?
if(athlete.running)
{
athlete.position += athlete.speed;
}

// Can the state for athlete.running == true && athlete.jumping == true? Or is one true while the other is false or vice versa?
if(athlete.jump_height < 1)
{
athlete.jump_height = 1; //NOTE lock min jump height
//athlete.jumping = false; ?
}
else if (athlete.jump_height >= athlete.jump_max_height) //NOTE lock max jump height
{
athlete.jump_height = athlete.jump_max_height;
athlete.jumping = false;
}
else
{
if(athlete.jumping)
{
athlete.jump_height *= athlete.jump_speed; //NOTE Calculate jump height
}
else //QUESTION athlete is not jumping then is he falling?
{
if(athlete.jump_height > 1)
{
athlete.jump_height *= 0.9; //QUESTION 10% less than last frame of falling?
}
}
}

athlete.scaleX = athlete.scaleY = athlete.jump_height;
athlete.x = athlete.position; //athlete.x always = athlete.position?
[/source]