Ive made a hybrid exersise called the jelqels.
When your 60-80% erect like normal pj workout push the pj to the base(bp) and then do a kegel, wich will push blood in. Hold the kegel until you tighten thee pj on your base then slowly pull up as normal. This creates a massive increase in pressure. BE very carefull with this though. Although this can be a great workout its more stressful to our penis. DO NOT pull fast because with the extra blood you can burst a vein.