The ability to enhance the physical condition of oneself or others. Variation of Augmentation.
The user can enhance the physical capabilities of themselves or others' so that they can reach high level mastery and control instantaneously, even reach a level of power that is usually beyond their limits alone. Users cannot steal or give power, only enhance the ones their targets already have.
Amplified abilities may get to the point that their user harms themselves.
Target effects usually fade over time.
Usually the target has to be in contact/range of whatever method used to be augmented.
Ikki Kurogane (Chivalry of a Failed Knight)
Ichigo Kurosaki (Bleach)
Z Fighters (Dragon Ball Z)
Wendy Marvel (Fairy Tail)
Devils enhanced with Rook or Queen Evil Pieces (Highschool DxD)
Enhancers (Hunter X Hunter)
Ernesti "Eru" Echevalier (Knights & Magic); via Physical Boost
Kotarou Tennouji (Rewrite)
Sakuya Ohtori (Rewrite)
Izuku Midoriya (My Hero Academia)
All Might (My Hero Academia)
Jinchuriki (Naruto); via Tailed Beasts
Ryu Hayabusa (Ninja Gaiden)
Pokemon that can use Agility, Bulk Up, Coil, Defense Curl, Dragon Dance, Harden, Rock Polish, Sharpen, Shell Smash, or Swords Dance (Pokemon)
Werebeasts (No Game No Life)
Ayato Amagiri (Gakusen Toshi Asterisk)
Galand (Nanatsu no Taizai)
Akane Sakurada (Castle Town Dandelion)
Potis Altiare (Ben 10)
Mark of Cain (Supernatural)
Zangetsu (Bleach) via Bankai
Hozukimaru (Bleach) via Bankai
Incursio (Akame ga Kill!)
Sapphire Dragon Fly (Xiaolin Chronicles); via energy
Tatsumi (Akame ga Kill!) wearing his armor, Incursio, which enhances the physical capabilities of the one who's clad by it.
Using the Kaio-ken, Goku (Dragon Ball) can augment his physical strength, speed, and senses up to 20x their natural limit.
The Mark of Cain (Supernatural) enhances the strength of the bearer to the point of overpowering vampires, shrugging out of an angel's hold, and even beat an angel bloody, and easily lift a Knight of Hell into the air. It also enhances the healing rate, allowing instantaneous healing.
Galand (Nanatsu no Taizai) augments his physical power to it's absolute limits when he activates his ability Critical Over until his magic power runs out.
Using her Gravity Core power, Akane Sakurada (Castle Town Dandelion) can enhance her own strength and speed.
Ryu (Ninja Gaiden) enhances his physical prowess with life-force.
Vizards (Bleach) increase their physical capabilities through hollowfication.
Ichigo Kurosaki (Bleach) vastly augments his physical power via complete hollowfication.
Rook Devil like Koneko (Highschool DxD) gain increased physical power via their Evil Piece.
Ikki Kurogane (Chivalry of a Failed Knight) uses Ittou Rasetsu, more powerful version of Ittou Shura which augment his physical power by by a hundred-fold.
As the No.1 Pro Hero and the 'Symbol of Peace', All Might (My Hero Academia) can enhance his body to immense levels through his quirk.
Through the technique of 'One For All Full Cowl', Izuku (My Hero Academia) gains enhanced strength, speed, mobility and agility.