Another popular and effective method for strength training was digging a small pit from knee to waist deep to jump in an out of. The fighter would only use the strength and explosive power of his legs to propel him upwards and land on his feet. This is very similar to the modern practice of plyometric training popular among Muay Thai and MMA fighters today. Thai fighters would also practice walking against the current of a strong stream and through thick, muddy rice fields to help build strong calf and thigh muscles.