I wanted to share a method another biker taught me about 15 years ago. I don't know how many of you are new to riding but during the first 7 to 8 years of riding, I had few instances that required that I pick the bike up after laying it down. Normally, the most instinctive method is to grab the handle bar and whatever part of the bike is accessible and lift it using mostly your back and part of your legs.
I had dropped my bike on our gravel driveway after loosing my footing and my friend saw the way that I was trying to pick up the bike and stopped me and then proceeded to demonstrate the proper way to lift a downed bike.
He was facing away from the bike and with his knees bent, one hand on the handle bar and his other hand on the grab rail by the seat and proceeded to lift the bike to a fully upright position.
What I immediately noticed was that the more than 80% of lift came from his legs with minimal strain to his back and upper body.
I used this same technique to assist another biker who had downed a gold wing at a local stop light. He couldn't lift it back up. I proceeded to demonstrate the "proper way to lift the bike" and he kept on thanking me.
Anyway, I wanted to share this experience in case anyone may need to pick up his bike. By the way, I'm 5'8" and weigh 175% but can still lift a downed gold wing in matter of seconds.
Hope this helps someone and possibly avoid a back injury.
Take care and ride safe.