I have used papain with some marinades for goat meat. Personally I do not care much for marinades any more, at least not long ones. For example, I used to marinate chicken overnight with spices and yogurt when making chicken tikka or tandoori chicken.
1 Pain at the base of the spine causes the psoas muscle to shorten and weaken(1,2,3,). 2  80% of Western people will suffer from debilitating backpain some time in their lives(5).  Western style walking (comfortable shoes & flat ground) fails to trigger muscles that stabilize hip joints & lower back.
There are many simple and effective exercises to help you strengthen your spine. Photo Credit Wavebreakmedia Ltd/Wavebreak Media/Getty Images. While you can't actually strengthen your spine, you can strengthen the muscles that surround it, and this thick group of muscles is called the erector spinea. They extend from the base of your head all the way down to the bottom of your back, and are essential for even the simplest of daily tasks.