| Clue | Source | Date |
|---|---|---|
| Exercise that strengthens hip flexors | New York Times | 14 May 2023 |
| Exercise typically done lying down | New York Times | 18 Dec 2022 |
| Abs exercise | The Washington Post | 05 Sep 2018 |
| Abs exercise | LA Times Daily | 05 Sep 2018 |
| Abs exercise | ||
| Exercise often done while lying down | New York Times | 13 Oct 2017 |
| Exercise often done while lying down | ||
| Simple exercise to work the abs | Premier Sunday | 08 Mar 2015 |
| Simple exercise to work the abs | ||
| *Yoga exercise |