A variety of factors affect whether you'll have DOMS after a squatting exercise session, including the intensity of the exercise, the duration, whether you've warmed up your muscles before exercise, stretching and post-session recovery.
Many observers are of the opinion that a large precentage of software-related inventions are no longer patentable after the Supreme Court's explanation of the abstract idea exception. See BitLaw's discussion on whether software is still patentable after the Supreme Court's Alice Corp. decision and MPEP Section 2106.
John, as the patent owner has the exclusionary right to stop others from making and selling his invention. Julie is therefore infringing John's patent, and John can bring a lawsuit for infringement or ask that Julie take out a llicense.