She took Tsunade's training to get stronger
Tsunade because sakura is still in training but there are hints that say that once shes older she will be the new tsunade if not stronger
training with tsunade to become a medical ninja.
Most likely because Sakura was Tsunade's student. Also because Sakura has the same brute strength as Tsunade does.
Yes, she gets stronger in Naruto Shippuuden under the training of Tsunade.
I assume you mean sensei............ But yes, Tsunade teaches Sakura.
When Sakura realises that she is too weak to help other people, she decides to become a medical ninja and learn medical secrets from Tsunade. She learned how to heal people and also she now has great strength in her body just like Tsunade
Sakura and Ino was (in part1) about ecual in strength, but in Shippuden, Sakura is stronger than Ino. Ino's total stat is 21 and Sakura's stat is 26. Sakura gained enough strength and beauty thanks to Tsunade. Jiraiya said that Tsunade did a good job in making a younger Tsunade and Kakashi even said Sakura can surpass tsunade.
Sakura asks Tsunade to train her in episode 141.
Sakura had a desire to become stronger, as she was tired of relying on Naruto. Tsunade agreed to train her.
Sakura is good at controlling her chakra and becasuse of her medical training that required good control of chakra, she can use that skill to make her every attack stronger like Tsunade.
Not Really. Sakura And Tsunade Are More Alike Than Ino.
Tsunade's 'birthmark' is actually the seal for her Creation Rebirth jutsu. Tsunade created the technique to safeguard the lives of her companions and it is currently unique to her. Unless she teaches the technique to Sakura or Sakura develops it herself, Sakura will never have the diamond mark.