Breakdown of Diese Übung macht meinen Rücken stark.
Questions & Answers about Diese Übung macht meinen Rücken stark.
Because Übung is a feminine noun. In the nominative case the strong declension of dies- for feminine is diese.
• Masculine nominative: dieser Übung (wrong gender)
• Feminine nominative: diese Übung (correct)
• Neuter nominative: dieses Übung (wrong gender)
mein is a possessive determiner. In the accusative singular masculine, determiners take an -en ending:
• Nominative: mein Rücken
• Accusative: meinen Rücken
Thus “my back” in the accusative is meinen Rücken.