user14387: If memory serves correctly, the historical Buddha did mention contemplating/investigating energy (viriya). Also remember mention of energy leading to the cessation of dukka. 
But does the Buddha, or other Buddhist teachings, ever expound upon energy in-depth, specifically techniques on how to raise/rouse energy — perhaps with the same level of detail the Abhidhamma does with the 121 types of consciousness — other than by intention? (as in:  
“What is virya? It is the mind intent on being ever active, devoted, unshaken, not turning back and being indefatigable. It perfects and realizes what is conducive to the positive.” via: The Abhidharma-samuccaya from https://en.m.wikipedia.org/wiki/Vīrya )

user11009: Buddha's many life stories are about the teaching of energy. More information from Wikipedia.
https://en.wikipedia.org/wiki/V%C4%ABrya

user10100: Energy in science is tejo, form, in Buddhism.
The encouragement is indriya and bala in Buddhism. This is the method of jhāna meditation. It was used before the Buddha enlightened by jhāna practitioner. However, the enlightenment of Buddhism is jāna, supra-mundane jhana (lokuttara), as well, so the encouragement was mentioned in tipitaka and atthakatha as leading to the cessation of dukka.
For every 5 encouragements, see lakkhaṇādicatukka in the path of purification, some in aggregates lesson and some in kasiṇa lesson.

user13709: As I hear it daily, energy is the antidote to laziness:

Furthermore, a mendicant lives with energy roused up for giving up unskillful qualities and gaining skillful qualities. They are strong, staunchly vigorous, not slacking off when it comes to developing skillful qualities. --dn33/en/sujato (Tens)


14387: <p>If memory serves correctly, the historical Buddha did mention contemplating/investigating energy (viriya). Also remember mention of energy leading to the cessation of dukka. </p>

<p>But does the Buddha, or other Buddhist teachings, ever expound upon energy in-depth, specifically techniques on how to raise/rouse energy — perhaps with the same level of detail the Abhidhamma does with the 121 types of consciousness — other than by intention? (as in:  </p>

<p>“What is virya? It is the mind intent on being ever active, devoted, unshaken, not turning back and being indefatigable. It perfects and realizes what is conducive to the positive.” via: The Abhidharma-samuccaya from <a href="https://en.m.wikipedia.org/wiki/V%C4%ABrya" rel="nofollow noreferrer">https://en.m.wikipedia.org/wiki/Vīrya</a> )</p>
 11009: <p>Buddha's many life stories are about the teaching of energy. More information from Wikipedia.
<a href="https://en.wikipedia.org/wiki/V%C4%ABrya" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/V%C4%ABrya</a></p>
 10100: <p>Energy in science is tejo, form, in Buddhism.</p>

<p>The encouragement is <a href="http://en.wikipedia.org/wiki/Indriya" rel="nofollow noreferrer">indriya and bala</a> in Buddhism. This is the method of jhāna meditation. It was used before the Buddha enlightened by jhāna practitioner. However, the enlightenment of Buddhism is jāna, supra-mundane jhana (lokuttara), as well, so the encouragement was mentioned in tipitaka and atthakatha as leading to the cessation of dukka.</p>

<p>For every 5 encouragements, see <strong>lakkhaṇādicatukka</strong> in the <a href="https://www.accesstoinsight.org/lib/authors/nanamoli/PathofPurification2011.pdf" rel="nofollow noreferrer">path of purification</a>, some in aggregates lesson and some in kasiṇa lesson.</p>
 13709: <p>As I hear it daily, <a href="http://50.18.90.151/scv/index.html?r=0.6884490375690835#/?showId=false&amp;iVoice=0&amp;showLang=0&amp;search=energy&amp;maxResults=25&amp;ips=3&amp;lang=en" rel="nofollow noreferrer">energy is the antidote to laziness</a>:</p>

<blockquote>
  <p>Furthermore, a mendicant lives with <strong>energy</strong> roused up for giving up unskillful qualities and gaining skillful qualities. They are strong, staunchly vigorous, not slacking off when it comes to developing skillful qualities. <a href="https://suttacentral.net/dn33/en/sujato" rel="nofollow noreferrer">--dn33/en/sujato (Tens)</a></p>
</blockquote>
