Latihan untuk meningkatkan otot perut adalah (latihan-untuk-meningkatkan-kekuatan-otot-perut-adalah)

https://brainly.co.id/tugas/12714005

https://brainly.co.id/tugas/16677228

https://osf.io/w7kyu/download/?format=pdf

https://ojs.unud.ac.id/index.php/sport/article/download/71505/38847

http://eprints.uny.ac.id/58285/1/TUGAS%20AKHIR%20SKRIPSI.pdf

http://lib.unnes.ac.id/5975/1/3305X_A.pdf

https://ejournal.unsrat.ac.id/index.php/ebiomedik/article/download/31693/30337

https://www.tokopedia.com/blog/manfaat-squat-hlt/

https://www.cnnindonesia.com/gaya-hidup/20180122142351-255-270690/8-latihan-sederhana-untuk-menguatkan-lengan


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> Top 20 ways make money online ( Make $ 100 USD-500 USD a day)