I believe you’ll develop speed via strength work which includes hill running, either repeats, or running hilly courses as the Kenyans do on a steady basis
However, I’ve also trained as much as 130 miles per week during periods when I worked a full-time job. It ultimately becomes second nature. It becomes a habit, a routine part of your daily life
Warning: PHP Startup: Unable to load dynamic library 'imagick.so' (tried: /usr/local/lib/php/extensions/no-debug-non-zts-20200930/imagick.so (/usr/local/lib/php/extensions/no-debug-non-zts-20200930/imagick.so: cannot open shared object file: No such file or directory), /usr/local/lib/php/extensions/no-debug-non-zts-20200930/imagick.so.so (/usr/local/lib/php/extensions/no-debug-non-zts-20200930/imagick.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0