I have found a good evidence of neck training improvement https://www.facebook.com/jeffnippard/photos/a.1460192484298982/1836136300037930/?type=3&eid=ARBLjhGZbjrf76lBnvqxMpxwJu64ioxI0ZZYzx5AsjF-jNvh2OomjIyfIbdwfPT9ewhc8LUFZ9gWjXc_&__xts__%5B0%5D=68.ARCXlwlPj3GN_79WNJSsqzJ3hCXsmEaPQu8ndciqZJ1ODXTcQ4xMdAPgdEY1xmHLeuOnGTQo4PqIEV753Cwfu1pQOsPFWGGYVVJw5tt8YvFDc64i_Z3SH9fVaIrowe9GjjPFxd1R_RyhgFPelYotmzk1JS1dRh0qhb8SvVXmqqANfkC5ZwWmsmChHY-VVcxLzLA-3hHfjNwT_evs5Uopg1ybH752RHj0g6B3mErGwkTzY_-Y8pVaR3Z-qsoZTLVaEJTHpbY6QFeQ3fWj7Pj4h4r1-ixdlyZOc60xxqgAd32-FjEEnC1grejVG45gOOx0vVEC93bPSi7jemCdV1rSbMFOZMgU&__tn__=EEHH-R